My brother-in-laws computer is failing to boot up all he gets is a 'no signal' error message on the monitor screen.
I have tested the graphics card, monitor, memory and HDD all are ok. The CPU fan is not working on my brother-in-laws system but works ok on mine so could this point to a problem with his M/B.
The CPU is a AMD-K6 which does not fit in any of my two systems so I cannot test it. If I was to hazard an educated guess I would say it was a M/B problem because the CPU fan works on my system but not on his. What do others think?
You say the CPU fan does not work in his PC and also no signal to monitor. Is any power getting through at all? Does the hard drive spin?. If not, then first check out the PSU unit.
The monitor displaying a "No signal" message could be due to above or simply that the signal being sent from PC is out of range, or faulty cable. I know this does not answer the question in full, but may give you a couple of ideas to try. j.
The hard disk does spin so power is getting to the hard disk I have not tested the PSU unit but I will although as I say it appears to be ok as power is getting to the hard disk. As I say I cannnot test the CPU and as the CPU fan was not working on his system this may have damaged the CPU.
I think Djohn is on the right lines to start with - even though power is getting to the hard disk it does not mean that power is getting to the motherboard, they are seperate connectors and circuits.
I would make sure the ATX supply cable is firmly in place and if at all possible, try another PSU. If this fails to rectify the problem then look to the mobo, but as Djohn, my thoughts lie with the psu.