Lenovo AIO

[frase]

I had a Lenovo AIO was showing no display this was my run through.
I returned it to customer as non repairable and just got their data off a Bitlocker drive in the end.

Was this model - Lenovo PITA AIO

Checked with another monitor.
Checked RAM with New Ram
CMOS BATTERY with New Battery.
RESET CMOS/Via Jumper
CHARGER TEST.
Reseated GPU/CPU Heatsink.

The PSU was built into the base.

So to me it came down to a board related issue, maybe the CPU. I have no idea how to test CPU on AIO's, so is embeded so I ended up stating board failure.

Anything else anyone may have done which I did not?

 

[NviGate Systems]

Unlikely to be the CPU unless it's one of the affected Intel units. Mainboards fail more than CPU do. In my years of repairing PC's I've only ever personally witnessed maybe one or two CPU failures. The rest were all mainboard failures.

The one CPU failure that I clearly remember wasn't even technically a CPU failure but a failure of the iGPU on a cheap AMD Sempron Chip that was producing green lines and artifacts. Once we replaced the chip those issues went away.

Most of the dead laptops I see are not CPU failures but board level failures. The issue is many non tech folks assume CPU = SYSTEM and many companies have just run with it, and in fact many companies now just roll the CPU in with the mainboard when having error codes and consumers just keep running with the whole "cpu failed" when in fact of all the components used in modern computing, RAM and CPU are likely the most long lived.

Likely if you tested the Mosfets on that board you would find they had failed, or some other 3 cent component that's critical.

 

[frase]

Unlikely to be the CPU unless it's one of the affected Intel units. Mainboards fail more than CPU do. In my years of repairing PC's I've only ever personally witnessed maybe one or two CPU failures. The rest were all mainboard failures.

The one CPU failure that I clearly remember wasn't even technically a CPU failure but a failure of the iGPU on a cheap AMD Sempron Chip that was producing green lines and artifacts. Once we replaced the chip those issues went away.

Most of the dead laptops I see are not CPU failures but board level failures. The issue is many non tech folks assume CPU = SYSTEM and many companies have just run with it, and in fact many companies now just roll the CPU in with the mainboard when having error codes and consumers just keep running with the whole "cpu failed" when in fact of all the components used in modern computing, RAM and CPU are likely the most long lived.

Likely if you tested the Mosfets on that board you would find they had failed, or some other 3 cent component that's critical.

Thanks I forgot to test the Mosfets, even so I would not have replaced; though yes diagnosis would have been more accurate. Though I did state to the customer was a board level failure.