Computer will not start Fan runs No display
Posted 07 December 2010 - 04:23 PM
Posted 07 December 2010 - 04:40 PM
You need to provide information about your computer, this includes is it a custom build or brand name such as Dell or HP and if it is provide the model name or series number, motherboard any add on card and PSU details would also help others to help you better.
How do you know?
I know the monitor works.
Turn what off and on the computer or monitor?
I have had this problem for awhile and have been able to start it if I turned it back off and back on again, one or two times. But now I have done that over 25 times
It is possible that the PSU has failed and the danger is that with the previous symptoms you have described it may have taken something else with it, if you can provide the info as asked we can make some suggestions.
Posted 07 December 2010 - 08:38 PM
Posted 09 December 2010 - 01:36 PM
Posted 09 December 2010 - 01:57 PM
Posted 09 December 2010 - 02:24 PM
It would be helpful if you could loan another PSU just in case it is not the issue (waste of cash) the only other option would to be to have the present PSU tested by a Tech who has the correct equipment, as there is no other way of testing them correctly due to the different output the leads distribute +3V +5V and +12V.
Give us an idea of a budget if you do need a new PSU and what does the computer primarily get used for, gaming or school work this makes a big difference.
One other thing you could try is clearing the CMOS by removing the silver CR2032 battery on the MB, this will restore the factory default settings, if you get the screen back you will need to go into the BIOS and reset the time and date, save the settings and exit, attached picture courtesy of rshaffer61.
EDIT: A couple of PSUs for you to consider should you need a replacement;
For everyday use http://www.newegg.co...N82E16817139017
For if you intend fitting an add on video card for gaming or 3D designing etc;
Just out of curiosity when you attempt to boot up is there any activity from the HDD, sound or the HDD LED flashing?
Edited by phillpower2, 09 December 2010 - 02:52 PM.
Posted 09 December 2010 - 06:56 PM
Posted 11 December 2010 - 05:15 AM
Even if the HDD had gone bad or the OS had become corrupt you would still get the BIOS screen, the fact that you are not getting any beeps indicates that the boot process is failing, possibly bad Ram or a failed graphics chip, one way of attempting to establish which one it may be is to remove the Ram and power up your system, it will not boot obviously but if you get error beeps it may indicate the Ram is ok and that the graphics chip is bad.
In order for us to be able to help you need to follow the testing advice given and post back the results so we know what steps you have taken but had no success otherwise we will be going around in circles, things to try include;
1: Test the monitor on another computer
2: Clear the CMOS by removing the silver CR2032 battery on the MB for a few moments and then replace it
3: Remove the Ram and power up to see if you get any error beeps
4: Swap out the PSU and put in a known good one
If the graphics chip has failed you will need to fit an add on graphics card and this would affect the power output required from the PSU so it is not practical to recommend a PSU until all the testing has been completed.
Yes you will be able to exchange the PSU yourself, do some research on how you go about it, be prepared, give yourself plenty of time to do it and above all ask for assistance if you need it we are happy to help.
Some PSU advice : http://www.huddyswor...dware&Itemid=72
Posted 11 December 2010 - 09:26 PM
Posted 12 December 2010 - 06:54 AM
You will need the correct type of PSU to test successfully.
I tried to connect a PSU from my old computers but it didn't have four p4 for the motherboard only 2 connectors.
This at least establishes that the monitor is fine and helps narrow the cause down a bit.
Hooked up the monitor to the other computer and it worked fine.
Why not it only means you will need to reset the time and date if you get the screen back and it can clear bad settings.
I don't really want to reset all the BIOS settings and stuff so I didn't remove the battery.
This could mean that either the MB or PSU is dead or even both, have you checked the MB capacitors? http://www.pcstats.c...m?articleID=195
I took out all the ram and it didn't make any beeps, but when I put the ram back the computer won't power at all. No lights, nothing.
Here is a simple way to check if your present PSU is functioning at all http://www.smpspower...rs-pinouts.html this test only shows if the PSU is getting any power at all and not that it is functioning correctly, this is due to the different voltages they put out, +3V, +5V and +12V if any one is not functioning you get issues.
Posted 13 December 2010 - 03:31 AM
Al77 , my Son CWSLuke has been posting for me. I got an old machine to work.
Edited by al77, 13 December 2010 - 03:53 AM.
Posted 13 December 2010 - 10:39 AM
Any beeps this time?
I connected it and pulled the RAM same problem
This only proves that the PSU is providing power of some sort, see the previous info below;
When it's running with the fan it lights up USB stick and the CD Rom opens.
this is due to the different voltages they put out, +3V, +5V and +12V if any one is not functioning you get issues.
This could be a good sign.
I checked all the capacitors and they seem alright, no leaks or bulges.
Has your MB got any details printed on it, a brand name such as Foxconn, Asus or Gigabyte for example?
If it has can you post the details along with the model and rev number, look by the CPU, between the PCI slots and around the edge of the MB, if the onboard graphics chip has gone, fitting an add on graphics card should do the trick so we need to know what type of card is required PCI, AGP or PCI-E.
Posted 13 December 2010 - 03:54 PM
Posted 14 December 2010 - 03:22 PM
Posted 14 December 2010 - 03:39 PM
What if I buy a PC that i can part out pieces of my PC and make a new one
Edited by al77, 14 December 2010 - 05:35 PM.
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