Question about Proscan 40LD45Q TV
PROSCAN 40LD45Q is known to fail in several different ways and the momentarily screen blink is one of them.
This particular failure on its own can be caused from two different issues - problem with the backlight circuit alone or problem in the 12/24 V rails of the standard power circuit.
If the TV remains ON (blue LED) then it's likely a backlight issue.
Still on the same board though.
For more details see
Hope this helps!
Posted on Jun 12, 2013
OK I Have a 40" Proscan 40LD45Q
had the power problem when you turn it on it would flash and then cut off again.
after checking I found that the transistor on the power board was bad.
Its one of the 2N4401 transistors found on the cold side in between the
cluster of resistors and and mosfet heat sink. kind of hard to get too
but replaced it and tv works great now.. $1.19 at radio shack for the part.
Hope this Helps ..
Posted on Apr 12, 2012
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Posted on Jan 02, 2017
You may have power supply DC filter caps problem, that will be the first place to look.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Please see my basic troubleshooting guide here:
Posted on Jul 03, 2010
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