Akira EPM 4200A Plasma monitor, 42':
I am looking to buy this used monitor, but according to the seller, it need an internal power supply in it. The seller says the monitor was purchased in 2000. I live in Des Moines, IA, and I don't know where it can be fixed... do you?
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In the absence of audio and video, the likely culprit is the main power supply which services both. Plasma sets use an output of the main supply to produce the high voltage required by the plasma display which has attributes similar to the older CRT displays in the use of high voltage and internal phosphor to convert electron flow into light.
The main supply may be a separate assembly. If you feel adventurous, pull the AC plug overnight and remove the back panel of the set.
Look for a smaller board with fewer, but larger, components on it. There may be another separate smaller board that produces the high voltage for the display but it is probably OK but not receiving service voltage from the main supply.
If you can find an assembly number on the main supply, you may be able to buy or exchange it for a repaired unit and do the swap yourself.
This is a problem we have seen on this particular unit. There are internal adjustment that must be done to correct this problem. This adjust is done on the power supply. There are VS, VE and VA adjust. Look on the interior of the Panel for voltage chart. Adjust these voltage accordingly.
SVA is a manufacturer based out of China. Their headquarters is based in LA California. They specify in affordable plasmas and LCD's which are typically a generation or so behind other LCD manufacturers or plasma manufacturers.
I have heard of this issue both in the power cord and internal parts of the TV's.
Is it still under warranty?
Otherwise, you can purchase another power cord. Contact the manfuacturer for those small parts.