Question about Compaq Evo D500 PC Desktop
Centre pin (+) on power supply socket appears to be "dry jointed" or loose connected to internal print...require to remove back panel to re-solder same. Does the plastic surround which appears to have an engineered crack and two very small screws retain the metal back panel? I spent fifty odd years in the electronics servicing game and it always pays to ask... Regards, Bernie de Silva
Posted by Anonymous on
I have the same problem with my Amicroe. Did you get the back cover off yours? If so, how did you do it?
Posted on Jan 10, 2015
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Posted on Jan 02, 2017
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This is typical with many sets when it goes old as there is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.
The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.
Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.
Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing. Check the power plug and the power socket for loose connection.
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