no beeps at boot time and nothing on screen

September 25, 2009 at 09:48:34
Specs: Windows XP
when i turn on power everything works fine,but there is no beep at boot time and nothing display on the screen.i knw MB and cpu work correctly but i m not sure about ram,i unplugged everything and just Ram and Cpu and MB is plugged to the power. i would appreciate any help,i m really confused.

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September 25, 2009 at 09:52:24
if the ram was faulty, the computer would give continuos long beep

however, you can try another stick

except this, the bios may be corrupted and maybe some other part has failed

our patience is big

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September 25, 2009 at 10:03:27
thanks,i tried all sticks,it didnt work,but about bios prob what should i do?

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September 25, 2009 at 10:12:34
if the bios is corrupted, you can reset the mobo jumper or, if your mobo doesn`t have one, reset the battery

might work, try it

our patience is big

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Related Solutions

September 25, 2009 at 10:25:43
i did that too,i take out the battery and put my hand in its place to reset battery,it didnt work too.

anyway thank u a lot

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September 25, 2009 at 11:10:50
The power supply, motherboard and CPU have to be working to get the initial beep (or any beeps). Try swapping out the power supply.

You can also remove the RAM, and you should get error beeps for the missing RAM.

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September 25, 2009 at 11:45:39
This is the most likely thing that's wrong in your sutuation:

Failing power supplies are common and can cause your symptoms.
Check your PS.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
See response 4 in this:

If it is failing, you can usually replace it with any decent standard sized standard ATX PS with the same capacity or greater.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Don't buy an el-cheapo PS.
See response 3 in this:

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD!)
You can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements.
Some power supplies have more than one +12v amperage rating - they have two or more - in that case you add the rated max amperages to determine the total +12v amperage rating.

The bios probably has nothing to do with your problem, unless you tried to flash the bios and that failed.

A mboard/cmos battery that is too weak or dead will NOT cause the computer to not boot properly and/or produce no video if nothing else is wrong.

Contrary to popular belief, it is extremely rare for ram that was working fine previously to go BAD, unless you have damaged it by something you did when installing or removing it, or unless it was damaged by some event such as a power failure or a power supply failing. Almost always, when you have a ram problem, it's either because the ram has a poor connection, or you have installed ram that is not compatible with your mboard's main chipset, or it's CPU's memory controller if that applies.

Ram that works in another mboard , or any ram you buy or have lying around, may not work properly, or sometimes, not at all - even if it physically fits and is the right overall type (e.g. SDram, DDR, DDR2, etc.; PCxxxx, xxx mhz) for your mboard. In the worst cases of incompatibilty your mboard WILL NOT BOOT all the way with it installed, and the mboard may not even beep - the ram has to be compatible with the mboard's main chipset, or in the case of recent mboards, compatible with the memory controller built into the cpu.

The same applies for testing your ram in another mboard - the ram must be compatible with the other mboard - if it isn't, any results of testing the ram on the other mboard cannot be relied upon to be valid.

If you still have the ram that was installed when the system worked fine, try installing just that ram.

See response 5 in this for some info about ram compatibilty, and some places where you can find out what will work in your mboard for sure:
Correction to that:

Once you know which module ID strings work in your mboard, you can get them from anywhere you like that has ram with those ID strings.

If you have brand name ram, it is usually easy to look up whether it's ID string is in a list of compatible modules found by using your mboard or brand name system model number.
If the ram is generic, that may be difficult or impossible.

If you do a ram test, do that AFTER having tried cleaning the contacts and making sure the ram is seated properly - otherwise any errors found may be FALSE.
If the ram is incompatible with the chipset, or on more recent computers, incompatible with the memory controller built into the cpu, it will likely FAIL a ram test - that is NOT a true indication of the ram being faulty - there is probably nothing wrong with it, and it will pass the test if installed in a mboard it is compatible with.

If you want to try a memory diagnostic utility that takes a lot less time to run a full pass than memtest86 does, this one is pretty good - Microsoft's
Windows Memory Diagnostic:
It can be toggled (press T) to do a standard or a more comprehensive set of tests - use the default 6 test one first - if it passes one pass of that, use the latter one. A few of the tests in the latter set are intentionally slower.
If you don't have a floppy drive, see the Quick Start Information at that Microsoft link for how to make a bootable CD of the Windows Memory Diagnostic (you need Windiag.iso - you don't necessarily need to use the program they mention to add it to the CD).

It is easy to test for incompatible ram that has caused your mboard to fail to boot.

Make sure you have a speaker or speakers or the equivalent connected to the mboard so you can hear mboard beeps (see your mboard manual or owner's manual if you need to).
Remove the AC power to the case/power supply.
Remove all the ram.
Restore AC power.
Try to boot.
If nothing else is wrong, you will get no video but you will hear a pattern of beeps that indicate no ram is installed, or a ram problem.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.

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September 25, 2009 at 11:52:35
Tubersandwires, you must be good-moody today

great answer :-)

our patience is big

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September 25, 2009 at 14:26:53
Thanks for that.
Most of that info I just copied from my frequent answers file and pasted it in.

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September 26, 2009 at 02:49:21
anyway, you had to write it once

our patience is big

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September 26, 2009 at 10:08:25
really thank u guys.but u knw i changed the power supply and it didnt work too.then i pulled out the ram and there was no beep too.i think it should have been a beep for that.
but the main prob is all of these hardwares worked just week ago and now they dont work.and now i just test Mb,Cpu,and ram with power supply,and there is no other hardware like graphic card and hard disk plug in .
i think i should check ram and its slots again.
i really appreciate ur helps anyway.

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September 26, 2009 at 10:11:57
man, some part is going bad

if you tested, cpu, ram and psu, then maybe the graphics is going bad

go here and read it

the mate had a problem with his graphics card ( was fried )

he removed it and the computer worked again

our patience is big

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September 26, 2009 at 15:01:44
As I have already tried to get across to you, there is probably nothing wrong with your ram that worked fine before.

State the make and model of your brand name system, or if it is a generic system, the make and model of the desktop mboard.
The specific brand name system model is usually on a label on the outside of the case somewhere, or it can be determined by going to the brand name's web site.
The model of the mboard in a generic system is usually printed in obvious larger characters on the surface of the mboard, often between the card slots.

Find the make of the orginal power supply on it's label all tell us what it is.

Unplug the case/power supply.
Power off your monitor.
Check all the connections of the wiring to make sure they are all the way onto their pins and into their sockets, especially the main connector from the power supply. The wires close to the mboard going into the main power connector/socket should be more or less perpendicular to the mboard surface rather than at an angle. Most mboards require an additional connector from the PS be connected to a socket for power on the mboard, other than the main socket - the mboard probably won't boot if that isn't connected. Make sure all cards in slots are all the way down in their slots.

Restore the AC power to the case/PS, switch on your monitor, try the computer

If that doesn't help....

Unfortunately, whether a power supply damages something else while failing or when it has failed compeltely is random. It's less likely to happen if you have a decent power supply brand. It's more likely to happen if you have an el-cheapo power supply brand.

E.g. many emachines desktop computers, and some cheaper desktop models sold by other brand name builders, have a BESTEC power supply - they are a lot more likely to damage something else while failing or when they fail completely, often the mboard.

In that case, when you replace the power supply, the system still doesn't boot normally.

In that case, if you replace the mboard with a used one that is the same, usually nothing else has been damaged and your system will then work fine. Used mboards for brand name systems are usually available for a reasonable price on the web. You could get any mboard that can be used with your cpu and ram, but if it's not the same one with the brand name's bios version on it, you probably won't be able to use the Recovery disk or disks for your model to re-load the original contents of the hard drive.

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November 11, 2009 at 16:07:46
i'm having the same problem. i just had mypc repaired yesterday and was working fine until i started to switch it on today. no beeps, no display on screen. and i can't turn it off by pressing the power button, so i have to disconnect from the power supply. please help me on this T_T

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