Solved No Signal and CPU takes 1 minute to settle to normal RPM

Microsoft Windows vista home premium wit...
March 2, 2014 at 08:59:22
Specs: Windows Vista Home Premium, 2GB
Hi. Been having problems lately with my Desktop Fujitsu Siemens Scaleo MS-7504. Please refer to my last post F12 Boot Menu problem. i restored my system to 23rd February and the restore was successful yesterday. I used my computer for a few hours and then left it on for 3 hours. When I returned there was no active keyboard or mouse. I plugged a second mouse in the front usb port and selected restart. When shutting down to restart my screen said No Signal Detected and in the last 24 hours, each time I try to start the computer, the CPU runs fast for about 20 seconds before settling down to it's normal speed but computer does not boot. I have cleaned the CPU and Power Supply of dust and unplugged everthing and taken RAM out and Battery but it still will not boot. I tried to remove the CPU from the motherboard but the 4 bolts do not come out completely as they appear to be self locking. Any suggestions on what to do? Thanks. Danny1234

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✔ Best Answer
March 9, 2014 at 15:57:58
First try cleaning the contacts on the edge of the card with a pencil eraser, then make sure that all the pieces are removed, then snap it in and out of the slot 4 or 5 times to burnish the contacts, then see if it works. If it does, run Memtest from a bootable CD to check for errors, if none, then you are set. If you still have errors, try cleaning the other stick the same way and retesting it. If one is still bad then visit www.crucial.com and let them scan the machine for compatible memory. Purchase it anywhere you like.

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



#1
March 2, 2014 at 09:51:52
Let's get the terminology right. Here's an example of a CPU >> CPU & socket

You can not hear a CPU running. What you're hearing is most likely the CPU cooling fan. It's normal for it to rev at startup. "No signal" means the monitor isn't receiving anything from the video card or onboard graphics.

"I have cleaned the CPU and Power Supply of dust and unplugged everthing and taken RAM out and Battery but it still will not boot."

How do you clean a CPU? And why did you remove everything? A system won't run without RAM & removing the battery has reset all the BIOS settings which could possibly prevent USB input devices (mouse & keyboard) from working. Do you hear any beeps at startup?

"I tried to remove the CPU from the motherboard but the 4 bolts do not come out completely as they appear to be self locking"

What is removing the CPU going to do for you? There's no moving parts & nothing to be cleaned. However, once the heatsink is removed, all the old thermal material will have to be completely removed from both the heatsink & CPU then fresh thermal paste will need to be applied (& applied correctly). Do you have any thermal paste? If you insist on removing the heatsink, it's most likely held in place by push pins.

http://www.intel.com/support/proces...


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#2
March 2, 2014 at 11:10:06
hi. yes, i meant the cpu cooling fan. when computer is switched on, the cpu cooling fan normally goes from high pitch to low pitch within 5 seconds and then i get 1 beep and the computer loads up to vista password page within 1 minute. Now the cpu cooling fan remains at the high pitch for 10 seconds then it slows down to normal rate in 60 seconds and Display says No Signal. Yes you are right about the graphics as this Fujitsu Siemens Scaleo L from 2008 which I have owned since new has onboard grahics card. I wanted to remove the cpu cooling assembly to clean it fully but as I could not remove the self locking bolts I decided to leave alone. I don't have paste and would not attempt it. Of course I put the RAM back and the battery and reconnected everything as it was but no change. This computer has a tendency to play up once in a while and stay in a state or domancy for a couple of days and 2 weeks ago decided not to work for 7 days and then it came back to life. I don't have a 2nd computer hence posting here to try to get to the root of the problem.

message edited by Danny1234


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#3
March 2, 2014 at 11:52:47
"I wanted to remove the cpu cooling assembly to clean it fully but as I could not remove the self locking bolts I decided to leave alone"

"Now the cpu cooling fan remains at the high pitch for 10 seconds then it slows down to normal rate in 60 seconds"

At what point did the change in fan RPMs occur, before or after you messed with the cooler? If you disturbed the heatsink on the CPU while attempting to remove it, you probably broke the thermal bond. If that's the case, it means it will now HAVE to be removed, thoroughly cleaned, & fresh thermal paste applied.

Are you hearing any beeps at startup? Unplug the power cord & disconnect all external devices except for the keyboard & monitor. Temporarily unplug all internal drives (hard drive, DVD, etc - both cables) & remove all RAM except one stick. Then try booting up & see if you can a display or get into the BIOS.

BTW, are you are using hibernate, standby, or sleep mode? If you are, that could be one of the reasons it "plays up". Those features are meant for laptops & sometimes cause problems with desktop machines. If you get the system up & running again, make sure to disable all those settings & reconfigure the power options.

message edited by riider


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#4
March 2, 2014 at 12:29:22
The change in the CPU's cooling fan RPM's was occuring before. And I didn't "mess" with it. There is no beep and I already did what you suggested but no change. Do you know what a vacuum cleaner sounds like? well that's the sound my Fujitsu Siemens Scaleo L makes though now instead of sounding like a vacuum cleaner for 5 seconds it sounds like one for 20 seconds and then it gets instructions from somewhere that it shouldn't be running that fast and then slows to it's preset state within 60 seconds. I just timed it. Is there something I can buy to diagnose this computer's problem or is there something on USB I can buy to plug in? or is it a case of buying a new or used Power Supply to try. I've already tried another HDD but it's not that. I think it is either a BIOS problem or the onboard graphics card is temperamental. Hope you can advise otherwise I will have to think about getting another computer.

message edited by Danny1234


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#5
March 2, 2014 at 12:56:20
Speaking of a vacuum cleaner, hopefully that's not what you used to clean inside the tower & PSU? Static builds up in the hose & can discharge into the electric components, frying them.

No beeps indicates that either the CPU or motherboard is bad, possibly the PSU. Did you unplug any power cables? If you did, are you sure you reconnected all of them, especially the 4-pin ATX12V plug that powers the CPU? Also, you said you attempted to remove the heatsink. If you broke the thermal bond between the CPU & heatsink, the system will not boot again until it's fixed. Breaking that bond disrupts the heat transfer between the CPU & heatsink causing the CPU temperature to rise quickly. The built-in thermal protection then kicks in & the CPU will automatically shutdown.


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#6
March 2, 2014 at 14:26:29
hi. no i don't own one. i reconnected everything. one thing i just noticed is i am pressing in the power on button at the front and it is now just whirring on and off. i keep pressing it in but it is not doing what it did earlier. it tries to start with green power light flashing on for half a second and just whirrs a bit. what could this be? ( if it decides to work by this time tomorrow i will let you know)

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#7
March 2, 2014 at 14:44:20
You need to strip your system down to the bare essentials to try to pinpoint the problem. Externally, just the keyboard & monitor - no mouse, printer, internet connection, etc.

Internally, you need to disconnect all drives, remove any add-in cards, & remove all RAM except for one stick. And make sure the power cord is unplugged before messing around inside the case. While the cord is unplugged, remove the CMOS battery for a few seconds or use the clear CMOS jumper to reset the BIOS (again).

And remember, if you dislodged the heatsink on the CPU, even slightly, it will have to be removed, cleaned, & reinstalled with new thermal paste.

http://www.intel.com/support/proces...


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#8
March 2, 2014 at 16:12:39
If the system is not too slow and generally worked well for you, it might pay for you to get someone you trust to see if it can be fixed for a reasonable amount of money. If it is generally slow or has been a problem for a long time, it might be better to replace the system since it is fairly old. With the price of current systems today, it does not pay to spend too much on it.
If you want to continue to try to repair it, Please be precise in what you are seeing and hearing and try what is requested of you carefully, meticulously, and report back what happens in detail. The more careful your explanations are, the less effort this will take and the less time. Questions are rarely asked of you without it being important and are to help you solve your problem.

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


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#9
March 8, 2014 at 07:27:32
Thanks for your replies and the information. I picked up another older machine but my screen still says "No Signal" with this second machine. I have a green light on my monitor but could this be a problem with my monitor? Also unplugged everything and the CPU fan is still running too fast for 60 seconds on the first machine.

message edited by Danny1234


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#10
March 8, 2014 at 15:53:12
It could be the monitor but it could be the monitor cable. If you have another monitor or cable or can borrow one for testing (try the cable swap first), swap them out to be sure.

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


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#11
March 9, 2014 at 01:41:29
Update Sunday 9th March.

Hi Fingers. Thanks for the reply. I read the post entitled "cpu starts and stop at start up at www.tomshardware.co.uk and the reply by jsc dated 4/5/11 and took note of some of the basics there. The older machine is an eMachines etower 633 dvd with 64mb SyncDRAM 256mb Max, 128 KB L2 Cache 66Mhz System Bus, 15GB Hard Drive Ultra DMA, 12X DVD, 3D AGP Graphics Intel Direct AGP , 56K Fax Modem and the operating system is Windows Me. As I said in my last post I just picked up this machine and I got "no signal". So I removed just one of the two RAM memory sticks with one intact and the older machine is working fine now. This now rules out any fault with the VGA cable or AMW monitor. The RAM is PC100 64mb 4M' 16 SDRAM one of which is faulty as I tried it in both slots by itself and the machine would not boot. Do these RAM sticks go faulty and for what reason? abd I guess I woyld need to replace it or could I get a higher RAM stick which would function with this older machine and if so could you give a make and and model number? TUpdate to follow...

message edited by Danny1234


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#12
March 9, 2014 at 15:57:58
✔ Best Answer
First try cleaning the contacts on the edge of the card with a pencil eraser, then make sure that all the pieces are removed, then snap it in and out of the slot 4 or 5 times to burnish the contacts, then see if it works. If it does, run Memtest from a bootable CD to check for errors, if none, then you are set. If you still have errors, try cleaning the other stick the same way and retesting it. If one is still bad then visit www.crucial.com and let them scan the machine for compatible memory. Purchase it anywhere you like.

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


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#13
March 11, 2014 at 00:37:10
Hi Fingers. Thanks. It worked. I didn't have a pencil eraser but I cleaned the contacts on the faulty RAM stick by spraying some furniture polish on a cloth and wiping the contacts and slotted and unslotted it 6 times and it booted fine. update to follow...

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#14
March 31, 2014 at 16:06:05
Hi

This is a update on my Fujitsu Siemens Scaleo L (Year of Manufacture 2008)

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.

Any suggestions?

Thanks

Danny1234


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#15
March 31, 2014 at 20:42:45
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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#16
April 1, 2014 at 02:59:57
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.


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#17
April 4, 2014 at 09:22:45
Hi

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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#18
April 4, 2014 at 14:30:19
Be very wary, about the only way to fry both the motherboard and the CPU is if the power supply went bad in a really bad way and sent significantly higher voltages through to the motherboard and CPU. If it was me, I would not reuse that power supply ever again.

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


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