Presario 2100 Motherboard Testing


I was given a Presario 2100 which in frustration was intentionally
dropped a few times - by the original owner. I would like to possibly
use it basically as a home computer connected to an external monitor,
keyboard, mouse, etc. However upon pressing the power button the blue
power LED and three adjacent LEDs and the CPU fan turn on for about 2.5
seconds and go off. The continues to repeat after a couple of seconds
except only the power LED and fan come on. Pressing any of the adjacent
buttons have the same effect. I started removing components, swapped
RAM, tried without RAM (replaced RAM afterwards), without hard drive,
without shattered monitor, without DVD drive, etc. with no effect. The
battery was not included so all the testing I have done was without the
battery. Is there a way to test such a motherboard standalone or with
minimal peripherals installed, or with external peripherals installed
instead such as an external VGA monitor, USB keyboard and mouse? I don't
want to spend any money on this computer I just thought I would try to
get it working before I throw it away minus a few parts (memory,
hard-drive). The motherboard appears to be in good shape - no visible
cracks or loose or damaged parts. I am an electronics design engineer so
I know that there could be invisible hairline cracks in any of the
hundreds of traces or broken solder connections. I just do not know what
to expect the motherboard to do when powered up like this. It is not
worth buying a service manual and I don't have schematics. I was hoping
for some diagnostic codes to flash on the LEDs or speakers (which are
silent when connected). Can anybody help before I send it to the
electronics resting place in the sky (or ground)? Thanks.


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