DaveC wrote:
Pioneer plasma model PDP-V401. Original symptom: shut off after seconds or
minutes or hours of operation. Power LED blinked error code 6 (as best I can
determine the meaning of this code from Googling (I have no manual) this
means PS fault).

Replaced 16 electrolytic caps in the main PS that measured high ESR.

Now when first powered on after an overnight rest, it will shut off
immediately (stays on for maybe 5 seconds). After power cycling the main
switch (can't be done via remote -- must use the switch on the back), it will
run all day without problem.

All PS voltages are OK (factory sticker inside lists them); all are a few
tenths high (ie, 5v = 5.04).

What next step would you take in troubleshooting this PS?

Thanks.


What's happening to the power supply voltages when it shuts down? Are
there any error codes or does it just turn off? Once it's on and
running, can you turn it off then back on with the remote?

I've seen a very similar problem with an old PC power supply that had
some bad capacitors, could you have additional bad caps? I've had a few
cases where a capacitor was in parallel with something else that caused
the ESR meter to read good even when the cap was bad.

It may also be a thermal problem as someone else suggested, freeze spray
is handy for this sort of thing, you can also use a can of that air
duster stuff held upside down.