Got this board here for rework. It came here about 2 or 3 months ago for repair... On the occasion it had a short on 3v3 line that was preventing machine to turn on, also some corrosion around U7100, which I cleaned and replaced. Machine worked well for the next 2 or 3 months and yesterday it came back. Machine turns on, get all voltages, no POST. Board alone draws around 1 amp from charger, CPU gets hot and have 0.9V on L7211/21 but no chime. Tried flashing BIOS and verified all termination resistors, all good... Still no POST. Tried replacing U7100 again, same.