WG K7000, vertical collapse after warm up

GrahM

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Got a K7000 that works fine for the first few minutes, then drops into full vertical collapse once it warms up.

Reflowed header pins and checked for cold joints. Cap kit was done a while ago.

Starting to wonder if the vertical IC is breaking down with heat, or if something else is causing it.
 
When I see odd vertical collapse issues (with any monitor), I start looking really closely at diodes or resistors that are actually broken, but look intact and are making intermittent connection.
Poke around with a tiny flathead screwdriver (powered off obviously), see if anything falls apart.
 
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