Computer Makes a Beep Turns Off and on Again
My reckoner starts and 2 seconds later beeps and shuts off
- Thread starter tedmax
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- CPUs HD
- #1
- Jul 14, 2004
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- #2
Is this a new build or a previously working computer?
If a new build:
Work systematically through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-posting-boot-problems
I mean work through, not just read over information technology. We spent a lot of time on this. It should notice most of the problems.
If it is a formerly working calculator:
The following is an expansion of my troubleshooting tips in the breadboarding link in the "Cannot boot" thread.
I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be different, simply they all use a single brusque beep for a successful POST.
Breadboard - that volition aid isolate any kind of case problem you lot might take.
http://www.tomshardware.com/forum/262730-31-breadboarding
Breadboard with just motherboard, CPU & HSF, case speaker, and PSU.
Make sure you plug the CPU power cablevision in. The system will not kicking without it.
I always breadboard a new build. It takes but a few minutes, and you know you are putting good parts in the example once you are finished.
You can turn on the PC by momentarily shorting the two pins that the case ability switch goes to. You should hear a serial of long, single beeps indicating retentiveness problems. Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU. Remember, at this time, you lot do not have a graphics menu installed so the load on your PSU will exist reduced.
If no beeps:
Running fans and drives and motherboard LED's do not necessarily indicate a good PSU. In the absence of a single short beep, they also do non bespeak that the organisation is booting.
At this indicate, you can sort of check the PSU. Try to borrow a known skilful PSU of around 550 - 600 watts. That will power just about whatsoever organisation with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure out between the colored wires and either chassis ground or the black wires. Yellowish wires should be 12 volts. Cherry wires: +5 volts, orangish wires: +three.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.
The grayness wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the instance switch. CPU needs this signal to boot.
Yous tin can turn on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to brusque the green wire to one of the neighboring black wires.
http://www.youtube.com/picket?v=5FWXgQSokF4&characteristic=youtube_gdata
A way that might be easier is to use the main power plug. Working from the back of the plug where the wires come out, use a blank paperclip to brusk between the dark-green wire and i of the neighboring black wires. That will do the aforementioned affair with an installed PSU. It is also an easy manner to bypass a questionable instance power switch.
This checks the PSU under no load conditions, then information technology is not completely reliable. But if information technology tin can not pass this, it is expressionless. Then repeat the checks with the PSU plugged into the figurer to put a load on the PSU.
If the system beeps:
If information technology looks like the PSU is adept, install a retentiveness stick. Boot. Beep pattern should change to one long and several brusk beeps indicating a missing graphics card.
Silence, long single beeps, or series of brusque beeps indicate a problem with the retentivity. If y'all get short beeps verify that the memory is in the advisable motherboard slots.
Insert the video bill of fare and connect any necessary PCIe power connectors. Kick. At this point, the organization should Postal service successfully (a unmarried curt beep). Notice that you exercise non need keyboard, mouse, monitor, or drives to successfully POST.
At this point, if the system doesn't piece of work, it'due south either the video menu or an inadequate PSU. Or rarely - the motherboard's PCIe interface.
Now start connecting the rest of the devices starting with the monitor, and then keyboard and mouse, then the residual of the devices, testing later each footstep. It's possible that you can pass the Post with a defective video carte. The Postal service routines can merely cheque the video interface. It cannot bank check the internal parts of the video carte du jour.
- May 9, 2006
- 233
- 0
- xviii,710
- xviii
- #iii
The reasons I have establish to cause similar problems;
ane: bad retention or improperly installed memory
Check that the memory is seated properly.
Install one stick of memory if that fails try a unlike stick
2: Improperly installed heat sink.
Modernistic processors heat upward very quickly and if the heat sink is improperly installed
thermal protection will shut downwardly the motorcar.
iii: Bad ability supply.
Based on your short clarification I am guessing memory and if non that then the power supply.
What exactly is the beep design. A single beep would just be the post. If that is what yous are getting I would suspect the ability supply or poorly installed heat sink beginning.
- #four
- #5
Is this a new build or a previously working computer?
If a new build:
Piece of work systematically through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-posting-boot-bug
I mean work through, non just read over it. We spent a lot of time on this. Information technology should observe almost of the problems.
If it is a formerly working reckoner:
The post-obit is an expansion of my troubleshooting tips in the breadboarding link in the "Cannot boot" thread.
I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be unlike, but they all apply a unmarried short beep for a successful Mail.
Breadboard - that will help isolate whatever kind of example problem you might have.
http://www.tomshardware.com/forum/262730-31-breadboarding
Breadboard with just motherboard, CPU & HSF, case speaker, and PSU.
Brand sure yous plug the CPU power cable in. The system will not boot without it.
I always breadboard a new build. It takes simply a few minutes, and you lot know you are putting good parts in the example once you are finished.
You tin can plough on the PC past momentarily shorting the 2 pins that the example power switch goes to. Y'all should hear a series of long, single beeps indicating retentivity problems. Silence indicates a problem with (in virtually likely order) the PSU, motherboard, or CPU. Call back, at this fourth dimension, you do not take a graphics menu installed so the load on your PSU will be reduced.
If no beeps:
Running fans and drives and motherboard LED'southward do not necessarily bespeak a practiced PSU. In the absence of a unmarried brusk beep, they also do non signal that the organization is booting.
At this indicate, you can sort of bank check the PSU. Endeavor to borrow a known practiced PSU of effectually 550 - 600 watts. That will power just well-nigh whatsoever system with a single GPU. If you cannot do that, utilize a DMM to measure the voltages. Measure betwixt the colored wires and either chassis basis or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +iii.3 volts, blue wire : -12 volts, violet wire: five volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- ten%.
The grey wire is actually of import. It should go from 0 to +5 volts when y'all plow the PSU on with the case switch. CPU needs this bespeak to boot.
Yous tin can turn on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to short the light-green wire to one of the neighboring black wires.
http://www.youtube.com/watch?5=5FWXgQSokF4&feature=youtube_gdata
A way that might be easier is to use the main power plug. Working from the dorsum of the plug where the wires come out, use a blank paperclip to brusque between the green wire and 1 of the neighboring black wires. That will do the aforementioned matter with an installed PSU. Information technology is also an easy way to bypass a questionable instance power switch.
This checks the PSU under no load conditions, so information technology is not completely reliable. But if it can not laissez passer this, information technology is dead. Then echo the checks with the PSU plugged into the computer to put a load on the PSU.
If the organisation beeps:
If it looks like the PSU is skilful, install a retentiveness stick. Boot. Beep pattern should change to one long and several curt beeps indicating a missing graphics carte.
Silence, long single beeps, or series of short beeps indicate a problem with the retentiveness. If you become brusk beeps verify that the memory is in the appropriate motherboard slots.
Insert the video card and connect any necessary PCIe power connectors. Kick. At this point, the system should Post successfully (a unmarried short beep). Notice that you do not demand keyboard, mouse, monitor, or drives to successfully Mail service.
At this bespeak, if the organisation doesn't work, information technology'due south either the video card or an inadequate PSU. Or rarely - the motherboard's PCIe interface.
Now outset connecting the rest of the devices starting with the monitor, and then keyboard and mouse, then the residuum of the devices, testing after each step. It's possible that you can pass the Mail service with a defective video card. The Post routines tin only check the video interface. Information technology cannot check the internal parts of the video carte du jour.
- #6
I take tried the above.
After I install the graphics card then turn on the pc I get one short beeb then information technology turns off.
I have tried 2 power supplies and different memory
Delight aid and thanks....
- #7
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Source: https://forums.tomshardware.com/threads/my-computer-starts-and-2-seconds-later-beeps-and-shuts-off.227130/
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