Re: Puzzle

Dr.H@l0nf1r£$ wrote:
OK I've completed all the tests I can think of and narrowed the fault
down. I'm now going to post here and get some opinions :

I had a system bought from PC World under the Medion label back in
2002. last year I was flashing the BIOS when everything died.
Eventually after a reboot all I could get out of it was a continuous
beep; nothing else, even the screen was blank. I stripped the PC down
completely and I changed the motherboard from a custom-made-for
PC-World MSI board to an ASrock P4i56G. I used the old CPU, a
first-generation P4 2.8 GHz single-threaded chip; and old memory, 2 *
256GB sticks DDR. I had to adapt the case to be able to fit in any
PCI devices in the PCI slots as the position of the PCI slots
differed. I refitted the old PSU though I had to change the fan and
heatsink as the old ones didn't fit the board, DVD ROM, CD-RW, floppy
drive, and PATA HDDs; an 80GB drive and a Maxtor 20GB drive. I
connected up the front panel correctly although the 2 front USB ports
were left unconnected as the plug didn't fit the new board. When
checked all thoroughly I powered up and switched on. :
The CPU fan and case fan ran for 1 second and died. I pushed the
button again; same thing. Since then I've tried powering up with the
CD-RW unconnected, the DVD-ROM unconnected, both unconnected, the
floppy unconnected as well, even the HDDs unconnected, all with the
identical result. I've tested the PSU and found it to be faultless,
I've tried swapping the polarity of some of the front panel
connections; but still nothing works for more than 1 second, apart
from the LEDs. : Either the power LED or the HDD LED illuminates
constantly but on power up the lit LED goes out and the other
illuminates until the unit dies after 1 second...
So it can only be 1 of 3 things or maybe a combination of more than 1
of 3 things wrong. Those being the CPU is dead, the memory is dead,
or the brand new motherboard is dead. (I was extra-careful about
static protection when I fitted it. I wore an earthed wristband and
did not rest the board on anything other than its anti-static bag
briefly, having removed it from the bag immediately before installing
it in the case. The case was earthed at all times during construction
and I wore the wristband at all times.)
So; before I spend anything on this, I need to know if it's the CPU,
the RAM, the mobo, or any combination. (If all 3 I'll simply bin the
project.)
Opinions please if you would be so good.

Thanks.

Coming on for a second and going off is oftem a symptom of the mobo not
being able to detect the CPU fan rotating. Is the CPU fan plugged into the
correct header on the mobo?
If it is, try chaning the fan itself (not the heatsink) for a different one?
Could also be that the HSF is not correctly fitted and the CPU is
overheating and shutting the board down.

HTH
SteveH


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