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No signal to monitor & no post beeps.

By iCE
Aug 22, 2003
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  1. When I boot up my PC there is no signal to the monitor and I do not hear any POST beeps. If I wait a while (it varies a lot; 30 sec to 3 mins +) it eventually starts up and works fine - never crashed. This is a new PC and the prob started to happen 1 week after I purchased it. It is getting worse and worse. I will take it back if I can't get the prob fixed myself. I checked that all cables are seated properly and heat does not seem to be a problem according to the BIOS reading and ASUS PC Probe. The specs are:

    Intel Pentium 4 2.60C GHz, 800 MHz FSB, 512 KB Cache, Hyper-Threading
    ASUS P4C800 Deluxe, Intel 875P Chipset
    Antec Performance Plus 1080AMG with Windowed Slide Panel
    Antec TruePower 430 Watt
    Corsair 1024 MB TWINX XMS3200 400 MHz CL2
    Sapphire Radeon 9800 Atlantis Pro 128 MB DDR
    Creative Sound Blaster Audigy 2
    Creative Inspire 6.1 6600
    Seagate SATA 80 GB, 7200 RPM, 8 MB Cache
    Lite-On 40X/16X CD/DVD
    Lite-On 32X12X40 CDRW
    Sony 3.5" Floppy Disk Drive
    Logitech Elite Keyboard
    Logitech MX500 Optical Mouse
  2. StormBringer

    StormBringer TS Rookie Posts: 2,871

    Sounds like it might be heat related within the monitor itself. If it is possible for you to connect another monitor it would easily rule this out. does this happen when the system is hot and first started, like running it a while, then shut down, and start it back up? If not, I'd still say it is heat related. Thermal problems are not always related to things getting too hot, sometimes a faulty component will work fine after it gets hot, and only show problems when it is cold, and vice versa.
  3. iCE

    iCE TS Rookie Topic Starter Posts: 36

    If it were just the monitor, I should still be able to hear the beeps from the system as it goes through the power on self-test. Since I don't hear any beeps I would say it's a hardware problem within the case.

    The problem happens all the time, whether I has been booted after running for ages, or booted after a day of not running.
  4. XtR-X

    XtR-X TS Rookie Posts: 1,040

    My friend has had a problem similar to this. Being carefull, you can remove a stick of RAM out and see if it boots. If not, switch it with the other stick. If you get it working, go ahead and shut down and stick the other stick back in, boot up, and it solves the problem mysteriously in most cases. If when sticking in the second stick of RAM, and it doesn't boot, take the second stick out again. If it boots, double check, then you can come to the conclusion that you've got a bad stick of RAM.
  5. Rick

    Rick TechSpot Staff Posts: 6,304   +52 Staff Member

    Make sure you have the heatsink properly attatched. Please verify the heatsink is turned the right way, because they are notched to fit IN the socket. If you have it on backwards, it sits and an angle above the CPU and does not make good (if any) contact, although it looks like it is snug.

    If this is not your problem, under NO circumanstances should your system EVER do this, despite your configuration settings or installed hardware.

    My suggestion is to return what it is you bought that is causing the problem. Especially if it is getting worse.. it just be machochistic to keep it.

    If you are looking for a solution, then you should probably start with the motherboard, CPU and PSU. Swap out each part with a known, working component (if available) and this will help you troubleshoot by elimination. Returning the board and CPU, I feel, will probably solve your problems.
  6. XtR-X

    XtR-X TS Rookie Posts: 1,040

    You shouldn't have to do all this work yourself. Take it back to the peeps that sold it to you. Tell them to fix it. If they can't, say you want a refund.
  7. iCE

    iCE TS Rookie Topic Starter Posts: 36

    Thanks for all your advice. I don't think I should spend my time figuring out the problem. I'll take it back soon, once all my exams are over and I have time.
  8. XtR-X

    XtR-X TS Rookie Posts: 1,040

    Just advice: make sure they will take it back and can take it back and see how long you have till you can take it back.
  9. ToRN

    ToRN TS Rookie Posts: 189

    It's your PSU that is broken. To check that out for sure, try a hard reset (reset button). I bet your PC will start promptly after the reset. Your PSU doesn't provide the right voltages to get your PC booting. With that reset you boost the initial voltages and reach the correct values. Or you can wait 30s-3 mins until it 'charges up' by itself.
  10. iCE

    iCE TS Rookie Topic Starter Posts: 36

    Sorry ToRN, I don't quite understand what you mean by "try a hard reset".
  11. ---agissi---

    ---agissi--- TechSpot Paladin Posts: 2,383   +15

    I think she means once its up and going, press the reset button. It should fire right up off a reset, instead of you having to wait 30-3 minz off a cold boot. It sounds like the PSU is having to 'charge up' for your PC to boot.

    The reason your PC should start right up again after a reset, is becasue the PSU has already charged itsself from when you did the orgional cold boot.

    So get your PC up and running, then press the reset button. When it resets do you still have to wait all that time?
     
  12. ToRN

    ToRN TS Rookie Posts: 189

    I think HE means. Okay, I'll change that avatar, but I am not a girl... :D (I do understand the confusion though)
  13. ---agissi---

    ---agissi--- TechSpot Paladin Posts: 2,383   +15

    awe gosh, im sorry :eek:
  14. iCE

    iCE TS Rookie Topic Starter Posts: 36

    Yeah, if my PC is aready booted, and a hit the reset button, it starts fine. So this means my PSU is broken and needs fixing. Correct?
  15. StormBringer

    StormBringer TS Rookie Posts: 2,871

    Not necessarily, it means the problem is somewhere in that general area though. It could be in a connection between the motherboard, PSU, and case buttons. Or the problem could be in the PSU. Check the connections first, then look to the PSU. The problem may not be that it is broken. It may be that it is not supplying enough current on the 12v rail.
  16. ---agissi---

    ---agissi--- TechSpot Paladin Posts: 2,383   +15

    But if its not supplying enough current on the 12v rail, its good enough to chuck right?
  17. StormBringer

    StormBringer TS Rookie Posts: 2,871

    No it isn't. Different PSUs supply different amps on the rails. Some are rated higher than others. Todays higher end hardware needs more current, especially on the 12v rail. If your PSU is rateed at less than 17A(minimum, I'd recommend more) on the +12v rail, it probably isn't oing to be enough to properly supply power for recent hardware.

    The current(A) rating is more important than the wattage because you could have a 500W PSU, but if it isn't capable of supplying proper current to the rails, it still won't be able to power the system properly.
  18. iCE

    iCE TS Rookie Topic Starter Posts: 36

    From the reviews that I've read, the Antec TruePower 430 Watt PSU seems pretty good, but I don't understand half the tech jargon when it comes to power supplies. Specs for this PSU can be found here http://www.antec-inc.com/specs/true430_spe.html but I don't know what half of it means.
  19. StormBringer

    StormBringer TS Rookie Posts: 2,871

    Look down at the Output values, you'll notice it says +12V has a max of 20A, this should be enough, so you may have a fault in the PSU. that is if you have checked the connections as I recommended earlier and tried all the other recommendations made by others and none of it works.
  20. Rick

    Rick TechSpot Staff Posts: 6,304   +52 Staff Member

    PSU is a very likely candidate.
  21. ToRN

    ToRN TS Rookie Posts: 189

    In any case, to correct the problem you will have to change the PSU. But, besides the problem at startup it should work fine for years. So, it is up to you to decide wether you are anoyed be it and want to replace it. IT WILL NOT BREAK YOUR SYSTEM.
  22. ---agissi---

    ---agissi--- TechSpot Paladin Posts: 2,383   +15

    Are you sure ToRN? My friends 4200 died because the PSU didnt supply enough power. (thats what i was told anyways)
  23. ToRN

    ToRN TS Rookie Posts: 189

    Yes I am sure. Once the PSU is at it's values, It stays at them. I have a machine running with the same problem for almost 3 years now. (yes, to lazy to change the PSU :)
  24. tribologist

    tribologist TS Rookie

    This seem similar to my co-workers problem. When he plug it in and hit the power on the only thing that happens is that the two power LED comes on (on the board and on the front) and all the fans start. Beside that NOTHING happens. no buzz from the disk, no beep, spinning of drives, NOTHING

    Even if we unplug the RAM, the processor or whatever, just nothing. After about 4 hours left like this the system boots up.

    From there it runs fine an it can be reset with the reset button or CTRL-alt-delete. If the power is interupted one have to wait about 4 hours before it boots again.

    The Board is a new P4C800
  25. iCE

    iCE TS Rookie Topic Starter Posts: 36

    Sure sounds like my problem, but i don't have to wait 4 hours lol. Same mobo hey? Interesting.
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