Solved Fan runs fast for 60 seconds and no signal

Microsoft Windows vista home premium wit...
March 22, 2014 at 08:38:43
Specs: Windows Vista Home Premium, 2GB
Hi All. I posted this problem about one month ago and it still has not been resolved. My PC is a Fujitsu Siemens Scaleo L model. I purchased it new in 2008. About two months ago it began causing problem (Please see my previous post here on this problem). I eventually got the computer to boot as the screen said "No Signal" and when I pressed the on button on the front panel, ordinarily the Cooling Fan would rev high for a few seconds and then settle down but about one month ago after I got it working again, I restarted the PC and it decided not to come back on with the screen saying "No Signal" and since then when I press the on button on the front panel, the Cooling Fan stays rev high for 50 seconds and then I can hear the Cooling Fan beginning to settle down to normal speed after about 60 to 90 seconds. Today I unplugged everything and removed the Motherboard MS - 7504VER : 1.0 from the Computer Case to have a closer look at the Motherboard and to take some photos. I was hoping to upload the photos here but cannot do that on here from my mobile phone. However I have taken a lot of photos and would be happy to email them if anyone cares to take a look. If so please post a reply with your email address and I will send them. I have looked online for an exact same model computer as mine so that I can plug my HDD in and get back to work but as yet I have been unable to find an exact same model. There are Scaleo P's about but not sure if that would work. I will be getting another used PC next week so that I can plug my HDD in. I should mention that my PC is dual core as I'm not sure if I mentioned this when posting previously. I have been trying to eliminate what the issue might be but having ruled out some things like Monitor, I am now at a loss as to what it might be. I may buy another PSU and RAM and see if either of those are the issue or failing that I would like to try another motherboard but I would prefer to pick up an identical PC so that I could plug my HDD in and get back to work. If anyone has any suggestions plesse let me know.

Thanks

Danny1234

message edited by Danny1234


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#1
March 23, 2014 at 06:48:14
"Please see my previous post here on this problem"

You should have posted a link.

Since you have the board out of the case, bench test it! My guess is the problem is with the CPU cooling fan. I seem to recall you tried to remove it but couldn't figure out how. If you disturbed the thermal bond between the heatsink & CPU in any way, that's likely the problem. Bench test!

I just posted this link in another thread: How to Bench Test / Troubleshoot Your System


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#2
March 31, 2014 at 16:03:20
To riider

I removed the 4 long screws from the CPU Cooling Fan and removed the unit from the CPU. The original thermal paste between the heatsink and CPU was dry, flakey and not completely covered. I cleaned the circular brass/bronze area on the CPU and applied new thermal paste and re-attached the heatsink to the CPU and put it back together. This did not solve the problem.

I tried 2 different new working Power Supply Units.
This did not solve the problem.

The RAM has been checked and is working.
This did not solve the problem.

The machine boots and the fan runs for 60 seconds before settling down and with no signal shown on Monitor.

I therefore conclude it must be a problem with Micro Star MS - 7504 VER: 1.0 Motherboard.

What are your suggestions now?

Thanks

Danny1234


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#3
March 31, 2014 at 20:57:41
✔ Best Answer
http://www.computing.net/answers/cp...
Last answer (today):
Look at this, select your CPU and see the correct method of applying the thermal compound, if you put too much or caused air bubbles by spreading, then you may have to redo it.
Is the machine able to boot to the BIOS set up or to a bootable CD like Memtest? If so, then the motherboard is probably fine. If you can get into BIOS set up, try resetting BIOS settings to default, save and exit. While default may not be optimal, it should allow full booting so you can tell if everything else is good. If you can get to boot to CD or BIOS, you may need to do a start up or other repair to windows so tell us this and if you can see anything else on the monitor except the no signal.
If you still only get a no signal (all ways) and you are sure that the power supply and memory is good, there is the possibility that the motherboard is completely gone or that just the video circuit is gone. In the later possibility, you may be able to borrow to test or purchase a compatible video card and see if the system can work otherwise that way.

You have to be a little bit crazy to keep you from going insane.


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#4
April 1, 2014 at 02:58:16
hi Fingers

Thanks for your reply and comments.

The thermal paste was applied correctly and expertly.
The machine is not able to boot to the BIOS nor MEMTEST.
The Motherboard is probably completely gone however your suggestion to try an external video card is a good and final idea and maybe worth a try.

I will submit a Follow Up on the outcome of this machine in the next few days.

Danny1234


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#5
April 4, 2014 at 09:17:45
hi Fingers and riider

Both the motherboard and CPU are dead. Cause of failure: Unknown.
They were tested in other working systems and were proven to be dead. The RAM 2 x 1GB were ok and were not affected by the simultaneous failure of the Motherboard and CPU.

This machine will now either be rebuilt or the working parts used in another machine.

Thanks for your replies.

Danny1234

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