820-00239 20V Stuck at 0.14a

[CGid]

System is not powering on.
a battery replacement was done about a month ago.

With the board alone on the bench the voltages are as follows
PPBUS_G3H - 13.07V
PP3V3_G3H 3.4v
PP3V3_S5 - 3.34V
PP3V0_G3H 3.08V
PP5V_S5 - 5.12V
PP5V_S4 - 5.12V
PP5V_S0 - 5.13V

L7210 Has 0V so CPUCore is missing. Resistance measures 6.8 Ohms

Any help is appreciated.

 

[2informaticos]

"System does not show up in DFU mode"
This isn't a T2 machine.

I suspect mechanical damage, caused in the battery replacement process.
Check all connectors, traces and components near the screw holes.

Just in case, try known good BIOS.

 

[CGid]

Will try known good BIOS. Visual inspection shows no signs of mechanical damage. After observing the whole board under the microscope I was unable to see any damage to any components, even by screw holes.

The machine worked for about a month with the new battery prior to this issue. I feel it may be the BIOS but will have to reprogram and see. Reprogramming the BIOS wouldn't affect customer data correct?

Furthermore if it helps, the system does charge at 50W when the battery is connected. Just no power on.

 

[2informaticos]

"The machine worked for about a month with the new battery prior to this issue"
For the future, post accurate information.
"System is not powering on after a battery replacement was done"
This was interpreted as the machine stopped to work JUST AFTER battery replacement...

 

[CGid]

I apologize. I wasn't aware of that fact at the time of posting. Will make sure all information is known next time.

 

[CGid]

Known good BIOS was tested with no change in function/condition

 

[2informaticos]

Looks like PCH/CPU problems...

All the previous voltages (before CPU core) present?