"ICESoft" wrote in message .. .
Been working on this unit off and on for a while. It will power on for
about 1/2 second then power right back off. History on this unit is that
for a while it started to power off on its own with no rhyme or reason, it
progressively got worse to the point that it wouldn't power up. Display
just barely appears before the unit turns back off.

I've checked the output transistors, they tested ok, also checked supply
voltages, they appear good as well. I also resoldered any suspect solder
joints I could find, still no dice. I don't have a full manual to work by,
just some schematics for it.

Looking for a kick in the right direction...

Thanks,
Benjamin Jennings

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Open up, check your power transistor/mosfet temperature after it power off, if hot then it proofs your thermo cutoff is working. Next figure what causes it to overheat.