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Occassionally power supply get shut down suddenly when i am working on my computer bios setting of my IBM mother board gets disturbed

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Hi, Have you checked the cpu cooling system, usually this happens if the heatsink does not sit on the CPU surface or there is some air gap, use heatsink compound to fill up the gap , or sometimes the fan RMP is slow cause of wear /tear.If not then check your ram and PSU.
Let me know

Posted on Jan 17, 2009

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My unit won't power up - power supply is good and not sure about the on switch any help would be appreciated -- motherboard is in an old HP Pavlion 700 case


Remove the little watch type battery from the mother board check the voltage with a meter should be about 3.5 volts. Then replace the battery on the mother board. This battery holds memory within the Bio chips on the mother board, if there was a problem that it sensed for turn on it will be in the Bio's memory, and maybe not allowing the computer to turn on, by removing the battery for a few minutes, the Bio's forget they had a problem, if you will. and the computer might turn on.
If you have all the voltages to the mother board from the power supply, it should turn on.
unless there is some reset circuit interfearing with it turning on. Or you might have a blown fuse on the mother board, I would check everything I could, and try everything I could, and if you still cannot get it to turn on take it to a computer shop and spend a few bucks for them to fix it.

Nov 11, 2010 | Mach Speed Matrix P4MSD-800 (P4MSD-800 D2)...

1 Answer

Abit av8 bios post codes 8.3 - 8.6 - 9.c What is failing on boot ? I get one long beep followed by 4 short beeps. I have swapped video cards and reflashed the bios with no help. If I reboot 2 or 3...


I still did not find beep code that match your problem..

Anyways here are the common beep codes for your motherboard.. it might help you too.
1. No beep - no reaction, the mother board is dead, power supply problem, processor and or ram problem.
2. 1beep - board is working fine.
3. One long beep then it shuts down - cpu problem, your processor is not working or missing.
4. 1short beep - system boots normally
5. 2short beeps - CMOS setting error.
6. 1long 1short beep - dram error
7. 1long 2 short beep - video card or monitor not connected
8. 1long 3 short beep - keyboard error.
9. 1long 9short beep - ROM error
10. Long beep - memory card is missing or not connected
11. Short beep - power supply error
12 Four beeps - there is no fan detected on Fan1 or Fan2 header. make sure to attach or reset CMOS bios to factory setting.


Hope this gave you an idea of your problem..

Much appreciated if you rate this help..thanks..

May 23, 2010 | Abit AV8-3rd Eye Motherboard

1 Answer

Shut it off


Explanation sounds like motherboard or SMPS problem.

Try removing all your cables from motherboard including hard drive and other cables. Make sure to note down the power button placement on mother to later set it up the same way. Also need to test motherboard

Unscrew your motherboard from the cabinet and tilt you cabinet, place some plastic or wooden peice on cabinet and put your motherboard over it. Connect VGA Cable & Keyboard to motherboard. Now connect the power cable to mother board. Looks like one in image and try powering on by connecting only powerbutton cables. See it allows you to on CMOS setup. If it does, try connecting hard drive cables and try booting up. If doesnt work, finally hope my recommendation might be of some information

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Recommendation
Replacing either would be less costly then getting complete new computer. You already have rest of things just get a good & latest package of CPU and Motherboard.


May 23, 2010 | EliteGroup P4M800PRO-M Motherboard

1 Answer

Mother board problem


First sometimes a PC will automatically shut down if the BIOS settings for temperature set and there is an issue. IE a fan is out and the PC is overheating. If you are sure that is not an issue. Then you can flash or do a BIOS reset by opening up the computer (TOUCH THE POWER SUPPLY BEFORE touching ANYTHING to the motherboard or any internals..this will take away any static you may have before you touch the motherboard). Then look on your motherboard for a jumper for the BIOS reset. You will have to move the jumper to one side to reset it. Then power up your machine, then power it down again and place it back into its original position. This "flashes" or "resets" the BIOS. NOTE: before EVER working internally power DOWN the machine and UNPLUG it!

Jan 28, 2009 | ASUS P5LD2-VM Motherboard

2 Answers

Problem on Boot


Hello tccat1,

Definitley sounds like a bad motherboard, however, try removing the memory and using a different stick if you have some. Maybe 512 see if you can at least get it to post.

Nov 14, 2008 | MSI K9MM-V Motherboard

3 Answers

New asus m3n72-d motherboard bios will not post


If you don't already have a case speaker hooked up to the board, you might want to connect one since there isn't an on board speaker and you will not hear error beeps otherwise.

Also, if you have another non-phenom AM2 processor handy you should really update the BIOS to latest release. Many late model Phenoms will not work on motherboards that have earlier BIOS releases and you will not be able to post. You should then choose "Set Optimized Defaults" and save the bios without any changes then shut down (not reset). When you power on again it should post and you should be able to get into the BIOS.

A third thing you can try (after you get a case speaker hooked up) is using a cheap pair of ddr2-6400 RAM to get the board to post so you can get into BIOS and change the voltage to the correct settings for your RAM if it requires a higher voltage than the bios expects.

Aug 23, 2008 | Intel Motherboard

1 Answer

The computer turns on but do nothin more....


It sounds like the BIOS chip is bad. if you cant reflash the BIOS, then the board is dead.

Jan 10, 2008 | ASUS P5LD2 Motherboard

1 Answer

Computer shuts down y by itself


remove ur power supply socket from the mother board short the pin green and black in the connector if the smps start no problen with the power supply then the problems lies with ur mother board wiring or fault in your mother board if your mother board has secondry power fix it correctly to mother board sock et with has 4 pin if its not working cousult a chiplel engineer the fault lies in the power supply of the motherboard

Dec 02, 2007 | EliteGroup 945GZT-M (V1.0) Motherboard

1 Answer

Can not save to bios


windows and the bios needs to know that the operating system can be shut down through windows, so when you go into the F2 or Del on boot up, go into advanced cmos setings and look for ACPI and make sure it is enabled. This sets the motherboard to support shutdown. Save and exit settings and reboot. Now go to control panel>performance and maintanance>power options and set the correct instruction for shutdown to shut the pc down. Remember evertime you remove the cmos battery or reset with jumpers you have to reset date and time and anything else you have changed to suit your set up

May 06, 2007 | Abit KN8 SLi Motherboard

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