820-3435 PPBUS 1.7v

[rlowe215]

Working on a 820-3435 board

Have green light
PPBUS are only 1.7v. removed F7040 and PPBUS only have resistent of 10ohm. So not fully shorted.

 

[rlowe215]

Pin 2 PPBUS_G3H thats 10 ohm.
Already tried inserted voltage, nothing getting hot with 1 volts
Strange thing is that my psu dont send out constant current before getting over 2 V. At 1.7v it draws 0.323 Ah. But over 2 V it sends out constant current but cant really find the short. A big part of the board starts to heat up slowly.

 

[JohnB8812]

5 volts max is 8.6.

 

[rlowe215]

yes I know but half of the board heats up just besides the cpu but cant find one component as I usually do. But how come ppbus is 1.7 and not 0v if shorted?

 

[rlowe215]

Yes thats what I thinking of. Resistance to ground and 1.7V on PPBUS makes me thinking of that short. If I measure VCore and it also shows 1.7V should confirm it am I right?