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Especially in the warm season it is inside the computer a lot warmer than in the cold season. This is because the components to be produced in the warm season a lot more heat. Many hard drives can be operated with a maximum of 60 degrees. At temperatures above 60 degrees, it becomes critical, because then threatened with a loss of data. With the help of special hard fans, hard drives can be kept refrigerated.
Here you should regularly check that the fan still work properly and that there is no dust on the fan.
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This ATX power supply came in with the complaint of intermittent no power. When testing it with power on, I could see that the fan is not working. Not only that, some filter capacitors also became bulge because of the heat accumulated inside the power supply. The failure of the fan would not suck out the heat generated by the components especially the switch mode power transformer. If you switch off a working power supply and power removed, touch the power transformer, you could feel it is quite warm. Another heat source would be the heat sink where the output diodes attached to it. Diodes run a little bit hotter in filter circuit than diodes in other circuits due to the high current present at the secondary output line.
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A customer sent me a JVC HR-J312EM model VCR for repair. The complaint was no power. I personally don’t repair VCR because I’m more on computer monitor repair. Because of he is a friend of mine; I told him that I’m willing to take the challenge to repair it. Repairing VCR at my era actually has begun to go obsolete because of the market filled with VCD players. Continue reading »
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This Viewsonic 15” Monitor came in with the complaint of color problem in the whole display. Some techs called it as rainbow display while some referred to it as color patches fault. This problem usually were related to a bad picture tube (due to a fall that caused the internal shadow mask to come out from the original location) or from a faulty degaussing circuit. Continue reading »
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If you think that electronic repair is very difficult to learn then you have to read this article where only by using a solder gun could solve a Monitor problem. Of course there were many tough dog cases (very difficult to find out the fault) in electronic repair but at the same time there were also many cases that can be solve by some simple ways.
This LG 710E LG Monitor came in with no blue color problem. How do I know if the blue color was missing? Simply run a color test (that you may also download from the internet) or from a Monitor testing program generator, you could clearly see as which of the color is missing when you run the color bar test.
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This DELL 17” Monitor (Made in Malaysia under LIKOM model L705XXX, product no: L7055LP) came in with no power symptom. Normally after opening up the cover I would look at the power supply (primary side) for any burnt and cracked components first. If there are darkened area and burnt components, I would tell myself that this Monitor needs a little more time to repair it. If it is not (component’s intact) I would usually begin to discharge the filter capacitor and start checking the fuse. Continue reading »
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Computer Monitor display problems such as no display with high voltage symptom can be caused by many reasons. A defective picture tube, a faulty video preamplifier IC, a missing heater voltage, torn signal cable, negative G1 voltage became too high (-120 volt and above), CRT board problems, a missing or low G2 voltage and etc could cause no display but with the present of high voltage.
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All cathode ray tube monitor (crt) have a sticker sticked on its crt coating. Those words or characters printed on the sticker are the type number of the picture tube. All cathode rays tubes, whether a monochrome (black and white) or colour crt are identified by a specific code consisting of numbers and letters. The cathode ray tube monitors codes are different from each other because different picture tubes have different characteristics. Television codes are more or less the same as the monitor codes.
For instance, most color monitor cathode ray tube has the designation code such as the M36AFA63X03. There are six meaning (parts) M/36/AFA/63/X/03 in these codes as explain below: Continue reading »
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Intermittent no power was the complaint of this Epson lx 300 printer. As usual, the main suspect was the power on/off switch. After removing the power board from the printer, I could clearly see a dry joint at the pin of the switch mode power transformer. This was the caused of the printer problem. There was no other loose connection or dry joints on the other part. Continue reading »
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