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Computer wont boot

We recently had a power failure while the computer was on.when I tried to start the machine it would start the fan above the cpu for about 2 seconds and stop. The display showed C1 and then F. followed by nothing. Any Idea's?

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Re: Computer wont boot

This is a memory detection fault. Remove and reseat memory, try one at a time. If no joy then reset the bios at the JBAT1 terminal put jumper from pins 1-2 to pins 2-3 for a few seconds then back to pins 1-2. Restart your pc hopefully then set time and date in standard bios settings and check hard disk is recognised.

Posted on Jan 24, 2007

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The computer won't start up

does the computer put anything on the screen?
does the computer one beep after self test?
what kind of lights or no power at all
any errors. windows boot up problems

Jul 08, 2015 | Gigabyte 7VM400M-RZ (GA-7VM400M-RZ)...

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Asus P8C WS error code 55

If you want to know what this is the error code is related to

Click start control panel administrative tools computer management then select event viewer this may vary depending on what operating system you have

extend the events there you will see errors in red you will no what exactly what the error was and at what time it occured

or click start type in event viewer press ENTER

you might be able work your way through the problem

When a computer completely fails to boot or to provide any sort of power on self-test (POST) beep codes, the cause is either a hardware failure, lack of power or a bad connection.

To solve these problems, it helps to start with potential environmental causes first, such as a problem with the AC power being supplied to the computer.

From there, a good rule of thumb is to simply start disconnecting items from the computer one at a time until just the CPU, motherboard, RAM and power supply remain connected, and then swapping in known good replacements for them.

Test the AC power to make sure there is power to the outlet. Inspect the back of the power supply to ensure the power cord is fully seated, the power switch is on and the voltage setting is set to the right voltage, which is typically 110 volts.

Inspect the inside of the computer for any signs of burned components, such as capacitors or integrated circuits that are deformed or discolored, and replace the affected expansion card, motherboard, drive or other device if damage is located.

Verify a proper connection for each expansion card, cable, drive and stick of RAM by disconnecting and reconnecting each item without removing it from the system.

This can sometimes clean corroded or loose contacts and solve minor problems that prevent the system from booting.

Disconnect the drives and remove all of the expansion cards except for the video card, and try to boot with a bare system composed of only the power supply, motherboard, CPU and cooling fan, RAM, and video.

Attempt to start the computer again. If the system boots, reinstall the removed items one at a time until the system again fails to boot, and then replace the component that is causing the failure.

If the bare system fails to boot, swap in known good components for the motherboard, RAM, video card, power supply and CPU until the system boots.

Swap components into a working computer one at a time until that system fails to boot in order to locate problem components.

Hope this helps.

Nov 22, 2012 | ASUSTeK COMPUTER ASUS P8C WS - Motherboard...

2 Answers

Abit NF8 wont even post. I get beeps of 4 short repeating beeps, space, then repeat till I power down. DVD burner lights up, but not floppy, or hd

4 beeps means that a main timer on the motherboard is not working - board replacement time, as it is internal to one of the main chips on board.

Feb 17, 2010 | Abit NF8-V2 NVIDIA nForce3 Chipset 1600MHz...

1 Answer

Computer wont start(Plz Help me ) Added Much Detail as possiable

start by removing everything, ram, any cards plugged in, drives etc. Then try and boot it. If the issue is still present, shut it down and remove the heatsink and cpu. I have known CPU's to be jolted out of their sockets after an impact. Take the heatsink off, lift the lever and remove the cpu. Check that all the pins are still aligned and straighten any bent pins then refit the cpu and lock the lever down. Refit the heatsink making sure that the heat transfer pad or heatsink paste is still present and lock it down. Plug the power cords and front panel wiring back in and try and boot it. If it boots, shut down and refit each item you removed one at a time, booting in between each item. If the issue arises again, the last item you fitted is the culprit. If you can refit everything and boot the system up, lady luck is with you. If you still cannot get it to boot after refitting the cpu, replace the mainboard. Sorry but without special gear, locating a fault like this on a mainboard is a real pain..

Dec 20, 2009 | Biostar G31-M7 TE Motherboard

1 Answer

CPU fan switching on and off repeatedly, computer not switchingon

Check the power supply switch of your cpu casing, make sure that it will not stuck when you switch on the power.

May 08, 2009 | Intel Motherboard

1 Answer


I habe exactly the same problem. I habe the P45 Neo3 Board with E8400 CPU and 4GB Dominator RAM(1066MHz). No signal aber reboot. A Bios-Reset helps vor a Moment, but after Restart, i habe no signal.

Jun 16, 2008 | Intel Motherboard

2 Answers

Problem booting up

This is a well-documented issue on GX280 Optiplex machines for which there is no permanent fix - at least there is not one I came up with or found elsewhere. The symptom is that after power on, the CPU fan spins faster and faster until it tops out at rather impressive RPMs. Swapping power supplies, memory sticks, CPU, the heatsink and fan assembly, or adding more heatsink grease does not make any difference. There are no beeps, no video, nothing. The problem is related to a CPU temperature sensor, and some machines may display a message on the screen stating so.
Through various trial and errors I was able to make almost any motherboard with this symptom boot up. A rather significant downward pressure applied on the top of the fan vent will make a system boot up and run for days, but the pressure has to remain in place or the system will freeze instantly. This pressure has to be applied not on the top of the entire fan assembly but just on the vent side, in a way that the heatsink will not make good contact with the CPU on the side opposite of vent. What I do is I place a 1/2" tall object at the top of the fan casing right at the tip of the vent and force the case closed. The PC will boot and work as long as the case is closed and the pressure is there.
I have no idea what the pressure on top of the heat sink vent really does. I suspected that maybe the CPU contact pins become elastic and deform over time. I tried carefully and tediously bending all of those pins up a bit to create a better contact point, but that did not work. I also removed and measured capacitors near the voltage regulators for capacitance, and all typically measure near their advertised values. I haven't seen a motherboard with popped caps and this racing fan issue concurrently, but this doesn't mean the symptoms are mutually exclusive; it's probably just a coincidence.
I'll keep looking and trying to find a fix for this issue. We have a small pile of motherboards with this identical issue at my workplace, and when/if I find a solution I'll be sure to write about it.
Good luck!

Feb 06, 2008 | Motherboards

5 Answers


use xp sp2 bbootable disk and simply run a repair installation it should heal your system

Oct 17, 2007 | Mach Speed (MSNV-939) Motherboard

1 Answer

Your CPU may have a problem

Have you removed all memory, other cards and unhooked all other drives to see if a short exists there? With a 300W PS some other component may be pulling too much that the CPU can't start so it tells you the problem is with the CPU or The CPU its refering to is on the video card? Good Luck, Tim

Feb 10, 2007 | Albatron K8T800 (K8X800 PRO LL)...

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