Question about Computers & Internet
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Posted on Jan 02, 2017
Normal POST - system is ok 2 short beeps POST Error - error code shown on screen No beep Power supply or system board problem Continuous beep Power supply, system board, or keyboard problem Repeating short beeps Power supply or system board problem 1 long, 1 short beep System board problem 1 long, 2 short beeps Display adapter problem (MDA, CGA) 1 long, 3 short beeps Enhanced Graphics Adapter (EGA) 3 long beeps 3270 keyboard card
Posted on Feb 22, 2009
The beeping ounds like overheating, assume you cleaned out the laptop cpu fan and heat sink when you had it apart?
The shorting issue that you refer to, indicates that there is an internal fault in the circuit that carries the DC power to the board. I would dismantle the laptop and try to power it on on an insulated bench, to see if you can spot any arcing as the Adaptor is plugged in. Check the board and look for the inline ceramic fuse, use a multimeter set to the OHMS scale and test the integrity of the fuse to see if it is carrying a current (battery out and unplugged from mains obviously). Then look to see if there are any blown or burned capacitors and resistors on the board or any burned circuit traces.
Also try a different adaptor and check the output voltage of the old one
Posted on Jun 21, 2012
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