SILVERTEC ELECTRONICS AUSTRALIA

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SERVICING

I do a lot of my own servicing work on my own equipment and I also occasionally look at equipment for friends. Here are some of my servicing stories that may be of interest to anyone doing similar work.
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Compaq CQ61 Laptop Repair

Our daughter had bought a new laptop before heading off to University. After five years of intensive use, the old laptop was well and truly the worse for wear, so she bought a new laptop and gave us her old laptop. When I assessed the old laptop, it was in a rather dilapidated condition, with a faulty keyboard and other issues.

I decided to repair the laptop for my wife to use, so I initially removed the old keyboard,  by removing the securing screws on the bottom of the laptop and I ordered a new keyboard. While waiting for it to arrive, I would just use a USB keyboard to continue working on the laptop.

See what was involved with the repair and how it turned out.
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Camping Lantern Repair

We'd been considering buying a camping lantern for the occasional time that there's a blackout at night, but after seeing the price of new lanterns, we decided to pass on that idea, as I thought I'd be able to construct something suitable using some white LEDs and a 12V SLA battery. However, when we were at the recycling centre, my wife came over with a camping lantern that she'd just found. I looked it over and then I removed the battery cover,  which revealed four “D” sized batteries. There was a lot of corrosion on the battery contacts, but the batteries looked reasonably new.


Some drastic action was required to repair the lantern, but we ended up with a good lantern at a bargain price, that even came with usable batteries. See what I did to get the lantern back into good working order again.


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Arlec Battery Charger Repair

I was sorting out a few things in my shed and I noticed the old Arlec battery charger that I'd picked up somewhere, quite some time ago. The case was broken and the low voltage leads were a bit on the ratty side, so I thought it might be time to have a look at it to see if I could bring it back to good working order.


I already had a replacement lower case half for the repair, but I still needed an upper case half before I could do anything with it. As it happened, we were going out the next day and we'd be calling at the recycling centre, so I'd keep an eye out for the part.


The repair was successful and I now have a good working battery charger.

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Medion Computer Repair

I was given a Medion computer by a friend, after they bought a new computer. I was told that Medion computer no longer worked and they would dump it if I didn't want it. I could see that the card reader door on the front panel was missing as it had been accidentally broken off some time ago and tossed out when the accident happened. However, the computer did have a Windows 7 license, making it a suitable candidate for repairing, so I grabbed it. We could do with an extra computer, as my wife and I usually share the one computer.


The repair ended up being anything but straightforward, but in the end it was successful, albeit with several work-arounds to solve a variety of different issues. See what was involved with the repair and how I solved several different problems.

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Taurus Arc Welder Repairs

A few years ago, I bought a Taurus 100A Arc Welder from Aldi, when it was on special. I already had a much larger Abel 110A Arc Welder that I'd bought around 40 years earlier, but the Abel Welder was quite heavy and hard to move around, having a copper secondary winding, as was common at the time that welder was manufactured. A smaller, more portable welder like this Taurus would be ideal for small jobs, where a higher welding current was not required.


A couple of issues with the original design of this welder "out of the box" were causing some problems when using the welder.


See what modifications I did to make this welder a much better unit overall.

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Simple Computer Service

I was just writing an email, when my computer Blue Screened and rebooted, so I decided to just turn it off and service it. It'd had a few “funnies” in it just lately, so it was now time for some routine maintenance. The computer is usually hibernated, which saves time when starting up, as well as saving data by not having to reload web pages, as would be the case if browsers are re-opened after starting Windows from scratch. It also allows the computer to be turned off fully, thus saving power.


There had been a few other issues with this computer from time to time as well, so it was time for some routine maintenance, to keep it going.


Read about what I did to get the computer back into good working order again.

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Computer Mouse Repair

I'd been using my computer and I'd left one of the hard drives defragmenting while I went and did something else. When I came back, the screen saver was on, but when I moved the mouse, I couldn't get the screen back up. I pressed the space bar and up came the screen, but the cursor would not move when the mouse was moved. 


I suspected the mouse had died, so I shut down the computer using the keyboard and then I replaced the mouse with a spare one. After powering the computer up again, that put it back into action and the dead mouse was put aside to be checked. Later, I decided to look at the dead mouse.


See what the problem was with this mouse and how I repaired it.

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Black & Decker Angle Grinder Repair

I was using my angle grinder when I detected some arcing from the brushes, so I immediately shut it down so that I could investigate what the problem was. Arcing from the brushes can be caused by one of two things. It could be either shorted windings in the armature, causing excessive current through the commutator-brush connection, or it could simply be that the brushes have worn down to their limit and are no longer making proper contact with the commutator. I've had this grinder for more that 30 years, so I suspected that it would be just worn brushes, as I've never replaced the brushes since I've owned it.


Parts were no longer available for this 30 year-old tool, so see how I got around that issue and got the grinder back into good working order again.

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A Tale of Two Torches

I've had a “Brand A” torch for a number of years and it was always proving troublesome. I hadn't used it for quite a while and when I went to use it, it wouldn't work. The three “Brand A” batteries that had come with the torch were flat and worse still, they had leaked and caused considerable corrosion to the inside of the torch.


A short time later, I went to use my “Brand E” torch, only to find that it too had flat batteries. However, fortunately, they hadn't leaked, so the torch was still in very good condition, but its one drawback was that it used a conventional globe. A thought then occurred to me, that maybe I could adapt the reflector and LED assembly from the “Brand A” torch to fit this much better quality “Brand E” torch.


See how this idea worked out and gave me a much better torch from the exercise.

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Quick Computer Repair

My mate Greg (alias) dropped in one afternoon and he had his desktop computer with him. He explained that every time he turned it on, it would start to load Windows, then he'd get a Blue Screen of Death and the computer would then re-boot. Would I mind having a look at it for him, because he had some important emails to answer and this being his only computer, he was stuck until he could get it working again.


It sounded like the problem wasn't too serious, so I had a look at the computer. I thought that I should be able to get it working again without too much trouble.


See what the problem was and what the solution was to fix it

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Computer Mouse Repairs

It was a Sunday afternoon and I turned on our older computer that we use for backing up our files, only to find that it shut down again after initially booting up. I'd been planning to upgrade this computer anyway, as the motherboard was quite old and it was still running Windows XP. I found a suitable replacement motherboard I had spare, so I started upgrading the computer, but now I would need a USB mouse, because there was no PS2 mouse port on the replacement motherboard.


As I didn't have any spare USB mice, I checked what faulty ones I had available and I found three. I hoped I could repair one or two of these.


Read about how I managed to repair two of the three faulty mice .

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Simpson Riveria 728 Washing Machine Repair

Quite some time ago, our late friend Rod, called in and dropped off a Simpson Riviera 728 Washing machine, which had belonged to friends of his. 


They'd bought the machine second-hand some time previously, but it had recently “stopped working”, so they had decided to just get another machine, rather than spending money on repairing this one. They'd then given this machine to Rod for disposal, so he dropped it off here for me to have a look at and see if I could repair it.


See what was wrong with the machine and what was involved in repairing it and getting it back into good working order again.

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Hyundai Getz Headlight Repair

Our daughter had been away at University and she'd come home during the mid-year break. She'd been having problems with the left-hand headlight on her Hyundai Getz. She'd replaced the globe several times, but on each occasion, the light had only worked for a short time before the low beam had stopped working again. Fortunately, she'd kept the globes, because they all still tested good.


I was able to find what the problem was with the headlight and at the same time, I also refurbished the polycarbonate headlight lenses, which had been badly weathered.


Read about what caused the problem with the headlight, how I fixed it and what was involved in the headlight lens refurbishment process.

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Film Scanner Service

We have a lot of photos that were taken with a film type camera, which we had before we got a digital camera. We want to eventually convert all our photos to digital format, so it was fortunate that my wife found a second-hand film scanner.


I thought I would test the unit, so after installing the software (which fortunately came with it) I tried scanning a few negatives to see how they came out. This was not too successful, as the pictures came out with all sorts of hairy effects, indicating that there was contamination inside the unit and it would need cleaning.


See what was involved in cleaning and servicing the film scanner.

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Dick Smith Multimeter Repair

In a bundled lot I bought on eBay, was a DSE Q1418 multimeter. This unit arrived without the battery and I noticed that one of the screws holding the back on was missing. I thought I'd fit a battery to the unit and test it.


After fitting the battery, I turned the unit on, but nothing happened. I was sure that the battery was good, so I got out one of my other multimeters to check it. Sure enough, the 9V battery tested good, so there was obviously a fault somewhere. The fault turned out to be something quite unusual, but I was able to find it and carry out a repair with little effort.


See what the fault was and what the easy and cheap repair was.

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Ebara Sump Pump Repair

A sump pump is a small self-contained pump with a float switch, which is used to pump water from a sump, pit or tank. The pump is fully automatic and it doesn't require any attention, as it will switch on when the water level rises to a certain height and switch off again after some water has been pumped out and the water level falls again.

We use this type of pump in our waste water tanks and I have three of these pumps spare. I was using one recently, which worked fine, but the next time I went to use it, it wouldn't work, so I had to get out another spare pump to use.

See what caused this pump  to stop working and how it was fully refurbished for less than 10% of the cost of a new replacement pump.

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Powered PC Speakers Repair

A friend dropped in and handed me a pair of powered PC speakers, saying that only the left-hand speaker worked. They'd bought a new set, so I could have the old set and maybe I could fix it. That sounded like a good idea, because this set was quite similar to the speakers we use on our computer, so a spare set wouldn't go astray.

I've repaired a few of these units in the past, mostly finding that the small transformer in them burns out, necessitating its replacement. In this case though, it was obvious that the transformer was still OK, by the fact that the set at least half worked, so there was some other problem with this particular set. 


The problem had been caused by a manufacturing defect. See what the easy fix was.

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TEViON Personal Video Recorder Repair

Our TEViON PVR had started to malfunction. At first, whenever the channel was changed to ABC2, the picture wentto monochrome and it would stay monochrome, even after changing to another channel. The only way to correct this was to change to a channel other than ABC2, then switch the unit off and back on again.


This issue persisted for some time, but the unit then started to occasionally freeze when playing back a recorded program. This condition slowly worsened, so the PVR was replaced with a new Panomax PVR, so the problem was then solved.


See what was wrong with this unit and how it was restored to working order again.

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Netgear 16 Port Network Switch Repair

I was given a non-working 16 port network switch, which I needed to repair when our eight port network switch started giving trouble. This 16 port unit was in good overall condition, except that it was totally dead.

See what was wrong with this unit and what I did to get it working again.
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Thermaltake 430W Power Supply Repair

From time to time, dead and dying computer power supplies come my way. I first test them with a LED Power Supply Tester and if they don't work, they are stripped for parts. If they work, they are tested with a Digital Power Supply Tester. If they pass this test, I then check further, to determine what faults they may have.

I was given two suspect power supplies, so when I had a spare minute, I set about testing them. I started with a Thermaltake 430W Power supply. I plugged it into power and hit the power switch, only to be greeted by a very loud BANG!!! and then the power went out. I unplugged the unit and reset the Safety Switch.

See what caused this to happen and what was involved in repairing the unit.
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Computer Power Supply Tester Repair

I was visiting Tim Matthews (alias) at his appliance repair shop, when his apprentice was testing a computer power supply with a Digital Power Supply Tester. He plugged the P4 connector into the wrong socket and blew the Power Supply Tester up.

Tim was about to bin the damaged unit, when he decided to test it. The backlight no longer worked and the +12V2 was flashing and showing 11.9V instead of flashing with LL as it should with the second 12V connector not connected. Tim was still going to bin it, so I asked if I could have it. He was happy to oblige.

See what the damage was and how I returned it to good working order again.
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LED Torch Repair

I always carry one of these small 9-LED torches in my pocket and I use it quite often. I noticed recently that my torch was not working very well, needing several bangs before it would show full brightness. The time had come for an overhaul.

These small torches are extremely handy and well worth having on hand. They are relatively cheap to buy and are almost a throw-away item, so you might think it's not worth the effort to repair one when it suffers a problem. However, for a small amount of effort and virtually no cost, a simple repair can be made to put the unit back into good working order again.

See what was wrong with my torch and what I did to fix it.
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Trade Tools Electric Drill Repair

Our good friend Rod dropped in on one of his many visits and he had with him, his small electric drill, which he said had stopped working. He's had it for quite a few years and he's done quite a lot of work with it, so he thought the brushes might have worn out. 


He often works with sheet metal and uses this smaller-than-average drill for drilling the 1/8” holes for  the pop rivets. He asked me if I would mind having a look at it for him. He's always doing me favours, so I was happy to oblige.


See what had caused it to stop working and the simple fix to get it back into good working order again.



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DSE Surge Catcher Power Board Repair

I was looking for something in my shed recently and I found a DSE Surge Catcher Power Board that someone had given me some time ago. At the time, I'd just put it away for later reference and I hadn't thought any more about it in the meantime.


When I tested it, it didn't work, so that meant dismantling it to find the fault.


See what was wrong with it and what I did to restore it to working order again.

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SIP Handymig Welder Repair

My gas-less MIG gave quite a lot of years of service with the occasional use that I put it to over years. One day, after not having used it for a long time, I needed to weld something small, so I got it out to use it. It had been working properly the last time I'd used it, however, it was now malfunctioning. The motor that feeds the wire was running flat out and it could not be slowed down with the wire speed control.


This made the welder pretty much unusable, because the wire speed needs to be set according to the job and the amperage used to weld various thicknesses of steel. So, this meant repairing the welder in order to be able to use it for my small welding job.


See what was wrong with it and the simple fix that put it back into working order again.

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SIP Handymig Welder Repair #2

I'd been using my SIP Handymig MIG Welder for a welding job, when the wire feed motor suddenly stopped working. I could hear that the transformer that supplies the welding voltage was turning on when I pressed the trigger on the hand-piece, but I wasn't getting any wire feed.


I've had this welder for over 20 years and I've done a couple of repairs on it during this time. On this occasion, however, I was concerned that the wire feed motor may need replacing, which could prove to be a problem, trying to source parts for a unit this old.


It turned out to be a simple fault that was easily fixed. See what the problem was and the easy fix.

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Lumina Carpet Sweeper-Vacuum Cleaner Repair

A friend gave me a Lumina upright carpet sweeper-vacuum cleaner with the comment that it would not turn on. They no longer needed it because they had purchased a new one and if I didn't want it, it would go to the dump.

I thought it might be worthwhile to look at it to see if it could be repaired, because I suspected that it would be something simple causing it to no longer work. It was still in pretty good condition overall, so if it could be repaired, it could have a further useful life, instead of going to landfill.

See what was wrong with it, what caused the problem and how I repaired it and put it back into good working order again.
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ONIX DVD Player Repair

I was given an ONIX DVD Player with an intermittent fault that sometimes prevented the DVD tray from opening. 


At first, the unit was still usable by pressing the Tray Open button several times, but after a period of non-use, the intermittent fault became permanent and the unit was therefore unusable.


After diagnosing the fault, I was able to repair it, using a spare part from an unusual source.


Find out what was wrong with it and what I used to fix it.



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Samsung SyncMaster 740N Monitor Repair

A friend gave me a dead Samsung SyncMaster 740N Monitor.  I have repaired several of these monitors, all with similar faults. Generally, they are quite simply and cheaply  repaired,  but sometimes, there's more wrong with them than first meets the eye.


These monitors probably aren't really designed to be repaired, due to the high cost of servicing here in Australia. Mostly, when a monitor dies, it's thrown out and a new one is purchased, because the cost is about the same and usually a newer type of monitor can be obtained for a little more than the cost of repairing the old one when factoring in labour.


Find out what was wrong with this one and how I fixed it.

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Two More Samsung SyncMaster 740N Monitors Repaired

Samsung SyncMaster 740N monitors seem to be very popular. I have just repaired another two of these monitors.

They are now quite old in terms of computer equipment and it would seem that more of them are now coming to the end of their lives.

However, they are usually easy and cheap to repair, when you aren't paying labour costs and can gain access to the required parts.

See what the problems were with these two 740N monitors and how I fixed them.
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HP Pavilion Computer Repair

My friend's HP Pavilion computer was crashing and failing to start. He'd had it for quite a few years and he was generally happy with it overall, as it suited his needs. He just used it occasionally to go on the internet and he didn't use it for other purposes, such as playing games or video rendering.


It's a fairly basic model, designed for the lower end of the market. It's quite suitable for its purpose, once the RAM is upgraded from its original 512MB to around 2GB.


I'd serviced this computer a couple of times in the past and it's basically a good machine.


Read about what was wrong with it and how I fixed it and saved him $120. 

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Samsung SyncMaster 226BW Monitor Repair

This Wide Screen Samsung SyncMaster 226BW monitor was discarded by its previous owner after five years of service, when it stopped working. It had been put in for repair, but then a brand new monitor had been obtained at a really good price, at a large retailer's computer clearance sale, so the repair was cancelled.


The monitor then came into my possession after the repairer passed it on to me in order to dispose of the now unwanted item. I was able to repair it without too much trouble, due to the type of fault that it had.


See what was wrong with it and the procedure to repair it.

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Maison Vacuum Cleaner Repair

When my teenage son was vacuuming his room, the vacuum cleaner suddenly died.  We'd had this vacuum cleaner for a number of years, as it had been given to us by a friend when they moved house.


It's my wife's favourite vacuum cleaner, as it's lightweight and easily manouvered. Cleaning the dust bag is relatively easy and it's a good unit overall.  I'd already repaired it a few times previously, but this time, it sounded like it was terminal. But, there was nothing to lose, so I checked out what was wrong with it.


This is how I repaired it and restored it to working order again.


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Maison Vacuum Cleaner Repair #2

Our middle (teenage) son had been doing some vacuuming (yes, really!!!) with my wife's favourite vacuum cleaner, when it started making a loud rumbling noise, so he turned it straight off. 


This situation was then brought to my attention, so I decided to check out what the problem could be. I turned the vacuum cleaner on and then off again quickly, so that I could hear it running, without risking possible further damage to it. It sounded terminal, but I decided to check it out further, to see if it could be repaired.


Fortunately, the unit was still repairable. See what was wrong with it and how I repaired it for under $5.

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Arlec Exhaust Fan Repair

When the exhaust fan stopped working, I thought the motor had burnt out, so I bought a new exhaust fan to replace it. I had a lot of trouble installing the new exhaust fan, due to the design of that particular model. Once I had it installed, it made a high-pitched screaming sound like a jet engine. 


This was an unacceptable situation, so I turned my attention to the old Arlec exhaust fan, to see if I could repair it.


Read about what had caused it to stop working and what I did to fix it and restore it to good working order.

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DGTEC HD Set Top Box Repair

My son had helped to set up a new Set Top Box for a friend of a friend. Their old one had been crashing and failing to turn on, so they bought a new one and tried to set it up. They had some problems with the setup and they couldn't get it to work.


When my wife and two sons were visiting our friend, it just happened that her friend dropped in and mentioned the problem they were having and my youngest son was able to get their new Set Top Box set up and working for them, so they gave us the old one that they no longer needed.


Read about what was wrong with their old Set Top Box and how I fixed it.

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