I recently replaced a bad fan that was causing the laptop to heat up and a LCD screen display that was no good. However, when I turned on the laptop turns on, you can see the lights go on, the LCD screen doesn't turn on but, the fan works now and after about 27 seconds the laptop beeps twice and shuts off automatically. Any ideas what that may be. Thx!!
This is caused by a system board failure. Take the laptop apart again and check all of your connections. Also make sure the ram and processor are seated correctly. You can also try hooking up an external monitor to see if any errors display. This may be an indication that the video cable connected to the system board is not fully connected.
From IBM website:
Two short beeps - System board failure
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