Issue With Video Computer Starts Then Shuts Off Twice and Starts Again With No Video
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- Jan 7, 2011
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What's happening is when I try to start the reckoner, information technology turns on and shuts off immediately. Example fans, CPU fan, GCard fan, example LEDs and PSU fan all turn on for that half second. If I press the ability button once more, aught happens..
The simply way I can get it to attempt to startup once again is if I flip the ability supply off and on again, but it still does the same thing. Oddly, if I try it over and over over again enough times, it will eventually kicking and run. I tin restart the estimator from Windows and it restarts fine, but if I shut it on and off it still has that same effect. It has come down to flipping my ability supply on/off a hundred times trying to get it to start with it eventually working.
This happened randomly later on owning my computer for about 5 months, cipher changed whatsoever, I but tried turning information technology on one twenty-four hours and it happened. I'm not sure if information technology'southward just me but it seems to exist getting worse and worse. I have tried unlike outlets, cleaning out everything, and unplugging all other cords except the ability cord. It's non the power button itself either..
A strange affair that happens is if I turn my PSU off, unplug information technology, turn it on, and button the power push, information technology will do the split-2nd turn on. If I turn the PSU off and on again after that, when I button the power push information technology volition run everything for about iii times longer than usual (well-nigh a second).
AMD Phenom 965 @ 3.4 ghz
2 x 2gb Gkill
XFX Radeon 5770
OCZ 700w PSU
Asrock 790gx mobo
Sunbeam Transformer Case
- Jul 14, 2004
- sixteen,893
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Not true. When yous turn a PSU on, only the small 5 volt standby power supply is working. The main power section is off with discharged capacitors. When you lot turn on the PSU with the case switch, the PSU starts to cycle upwardly. When the primary voltages attain operating levels, the PSU sends a control point to the CPU telling information technology that the PSU is fully on and it is OK to boot.
Work systematically through our standard checklist and troubleshooting thread:
https://forums.tomshardware.com/threads/perform-these-steps-before-posting-most-mail-boot-no-video-problems-sticky-updates.3528107/
I mean work through, not just read over it. Nosotros spent a lot of time on this. It should observe most of the issues.
If non, read on.
I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may exist unlike, merely they all use a single short beep for a successful Mail service.
Breadboard - that will help isolate any kind of case problem you lot might have.
http://www.tomshardware.com/forum/262730-31-breadboarding
Breadboard with just the motherboard, CPU & HSF, case speaker, and PSU.
Make sure you plug the CPU ability cable in. The organisation will not kicking without it.
I e'er breadboard a new build. Information technology takes only a few minutes, and you know you lot are putting practiced parts in the example once you lot are finished.
You can turn on the PC by momentarily shorting the 2 pins that the instance power switch goes to. You should hear a series of long, single beeps indicating memory problems. Silence indicates a trouble with (in most probable order) the PSU, motherboard, or CPU. Recall, at this time, you do not take a graphics card installed and then the load on your PSU will be reduced.
If no beeps:
Running fans and drives and motherboard LED's do not necessarily point a expert PSU. In the absence of a single short beep, they also do not indicate that the system is booting.
At this bespeak, yous can sort of cheque the PSU. Try to borrow a known skilful PSU of around 550 - 600 watts. That will power just about any organization with a single GPU. If you cannot do that, employ a DMM to mensurate the voltages. Measure out between the colored wires and either chassis basis or the black wires. Yellow wires should be 12 volts. Ruby-red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.
The gray wire is really important. It should go from 0 to +5 volts when you plow the PSU on with the case switch. CPU needs this signal to boot.
You can turn on the PSU past completely disconnecting the PSU and using a paperclip or jumper wire to short the green wire to one of the neighboring blackness wires.
View: http://www.youtube.com/watch?v=5FWXgQSokF4&feature=youtube_gdataA mode that might be easier is to utilise the chief ability plug. Working from the dorsum of the plug where the wires come up out, use a bare paperclip to short between the greenish wire and i of the neighboring blackness wires. That will practise the same thing with an installed PSU. It is also an piece of cake manner to bypass a questionable case power switch.
This checks the PSU nether no load conditions, and then information technology is not completely reliable. But if it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.
If the system beeps:
If information technology looks like the PSU is proficient, install a memory stick. Boot. Beep design should change to i long and several short beeps indicating a missing graphics card.
Silence, long single beeps, or series of short beeps indicate a problem with the retention. If y'all get short beeps verify that the memory is in the appropriate motherboard slots.
Insert the video card and connect whatsoever necessary PCIe power connectors. Kicking. At this signal, the system should Mail service successfully (a single short beep). Notice that yous do not need keyboard, mouse, monitor, or drives to successfully Mail.
At this point, if the organisation doesn't piece of work, it'due south either the video bill of fare or an inadequate PSU. Or rarely - the motherboard'southward PCIe interface.
At present, starting time connecting the rest of the devices starting with the monitor, and then keyboard and mouse, then the residue of the devices, testing later on each pace. Information technology'due south possible that you can laissez passer the POST with a defective video card. The POST routines can but check the video interface. Information technology cannot check the internal parts of the video carte.
- #ii
- Jan 7, 2011
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Yes.Only putting information technology out there, did you try turning information technology on with the PSU switched the other way?
- Dec 21, 2009
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- #four
- Jan seven, 2011
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- xviii,510
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Just tried it and nothing
- Jul 14, 2004
- 16,893
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- 52,960
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- #6
Not truthful. When you turn a PSU on, only the small 5 volt standby power supply is working. The chief power section is off with discharged capacitors. When you lot plough on the PSU with the case switch, the PSU starts to bicycle upwards. When the main voltages attain operating levels, the PSU sends a control signal to the CPU telling it that the PSU is fully on and information technology is OK to boot.
Piece of work systematically through our standard checklist and troubleshooting thread:
https://forums.tomshardware.com/threads/perform-these-steps-earlier-posting-nigh-post-boot-no-video-issues-sticky-updates.3528107/
I mean piece of work through, non just read over it. We spent a lot of time on this. It should notice most of the problems.
If not, read on.
I take tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be different, merely they all apply a unmarried short beep for a successful POST.
Breadboard - that volition help isolate whatsoever kind of case problem you lot might accept.
http://www.tomshardware.com/forum/262730-31-breadboarding
Breadboard with just the motherboard, CPU & HSF, case speaker, and PSU.
Make certain you plug the CPU power cable in. The system will not boot without information technology.
I ever breadboard a new build. It takes only a few minutes, and you know yous are putting good parts in the case once you are finished.
Yous tin can plough on the PC by momentarily shorting the 2 pins that the case power switch goes to. You should hear a series of long, single beeps indicating memory problems. Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU. Remember, at this fourth dimension, you practice not accept a graphics card installed so the load on your PSU will be reduced.
If no beeps:
Running fans and drives and motherboard LED'southward practise not necessarily indicate a skilful PSU. In the absenteeism of a unmarried short beep, they as well practise non indicate that the organization is booting.
At this betoken, you lot can sort of check the PSU. Try to borrow a known good PSU of around 550 - 600 watts. That will power just about whatsoever system with a single GPU. If you cannot practise that, use a DMM to measure out the voltages. Mensurate betwixt the colored wires and either chassis ground or the blackness wires. Yellow wires should be 12 volts. Cherry wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- v% except for the -12 volts which is +/- ten%.
The gray wire is actually important. It should go from 0 to +5 volts when you lot turn the PSU on with the case switch. CPU needs this signal to kicking.
You tin can plough on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to curt the greenish wire to 1 of the neighboring black wires.
View: http://www.youtube.com/watch?five=5FWXgQSokF4&feature=youtube_gdataA style that might be easier is to use the chief power plug. Working from the back of the plug where the wires come up out, use a bare paperclip to short betwixt the greenish wire and 1 of the neighboring black wires. That will do the same thing with an installed PSU. It is too an piece of cake way to bypass a questionable case power switch.
This checks the PSU under no load conditions, so it is not completely reliable. Only if information technology tin non pass this, information technology 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 it looks similar the PSU is adept, install a memory stick. Kicking. Beep pattern should change to one long and several short beeps indicating a missing graphics card.
Silence, long unmarried beeps, or series of short beeps indicate a problem with the memory. If you go short beeps verify that the memory is in the appropriate motherboard slots.
Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the arrangement should Post successfully (a unmarried brusk beep). Notice that you practise not need keyboard, mouse, monitor, or drives to successfully Postal service.
At this indicate, if the system doesn't work, it's either the video card or an inadequate PSU. Or rarely - the motherboard's PCIe interface.
At present, starting time connecting the rest of the devices starting with the monitor, and then keyboard and mouse, then the rest of the devices, testing after each step. It'southward possible that you can pass the Post with a defective video carte du jour. The Mail service routines tin can only check the video interface. It cannot check the internal parts of the video card.
- January 14, 2006
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- Jan vii, 2011
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- Jan 7, 2011
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- October 19, 2010
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- Nov 26, 2011
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- Dec 27, 2011
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took out cardboard and retightened screws, aforementioned problem occurred. loosened srews half turn and worked once again. problem is the mobo is shorting out on the example because information technology was tightened to tight to the case. Dorsum off your srews in the mobo to the case a half turn and you should exist good. worst instance go along the thin slice of cardboard nether the mobo and srew mobo back downwards therefore iliminating short. have fun!!!no stress
- Feb 15, 2012
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- #14
I had the same problem with my computer. I got some advice from an IT expert....well my situation was exactly similar yours i.e turn on comp, all lights and fans turn on and turns off 1 2nd afterward.
Solution:
1. Disconnect all ability cables and monitor cables
2. Pull out all the ram from each of their ram slots (northward.b brand sure you put information technology back in the aforementioned society aswell)
3. There is a push button blazon battery located somewhere on the motherboard, have a look for it and merely pull or pop it out.
iv. Flip the bombardment upside down and put it dorsum into the motherboard
5. Put all the ram dorsum into their slots in the same lodge you lot took them out
six. Push button the power button and keep pushing the ability push button continuously until you hear the hdd and other stuff kick it (push information technology maybe 5-ten or then times)
seven. The cpu should concord out and yous should hear the beep and the computer should load something where it prompts you to continue or setup (the usual stuff)
viii. Press the push button that says continue. In my case i take an AMD and information technology said "press F1 to continue"
Permit me know how it goes 
goodluck
- Sep 3, 2006
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