A30P - blank screen, external VGA ok

[ywis]

hi

I have an A30P with no video. I would be extremely grateful for any help with an exact diagnosis. Here are the details:

• - external VGA video ok
  - external DVI using port replicator ok
  - Disk Doctor diagnostics - pass
  - lid switch does not seem to be stuck
  - no damage to the logic board from a long screw
  - screen assembly works on another board so I reason the cable, backlight and inverter are ok
  - no obvious change due to pressure on the graphics chip
  - I have tried looking at the screen with a light and can't tell whether the screen is in fact showing anything or if the problem is just the backlight being off.

I have another board which has a problem with the BGA connections on the graphics chip; this seems different however.

thanks

[ajkula66]

I've had the exact same issue that you're describing while these were still fairly new. IBM replaced the motherboard since the machine was still under warranty.