Have to keep turning computer on and off!

Discussion in 'Windows Desktop Systems' started by Gigabot, Dec 22, 2008.

  1. Gigabot

    Gigabot OSNN Senior Addict

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    I always have to turn my computer on and off to get it to turn on. I have an HP Pavilion Slimline PC and I've had this problem for months now. Everytime I leave it on standby, shut it down, or put it on hibernate I need to press the power button till my computer fully shuts down. When I try to turn my computer on again I have a blank screen, no BIOS or anything just the processor lights blinking and then I have to keep on turning my computer off and on till I see an orange light indicating that my computer will fully turn on including my monitor and Bios, etc. and it fully starts up. Does anyone know what could be the problem? :ermm:
     
  2. trukkmann

    trukkmann OSNN Addict

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  3. falconguard

    falconguard Carbon based lifeform Political User Folding Team

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    Trukmann is right, seems to me the problem is that you PSU is failing.
     
  4. Johnny

    Johnny .. Commodore .. Political User

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    Yeah, it does sound like a PS problem ...
     
  5. kcnychief

    kcnychief █▄█ ▀█▄ █ Political User Folding Team

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  6. Johnny

    Johnny .. Commodore .. Political User

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    Good thinking, KC. We wouldn't want him to waste the money if he doesn't have to.
     
  7. LeeJend

    LeeJend Moderator

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    It sounds more like the MB bios is not handling low power modes properly more than a power supply problem. If it was the PSU then I would expect it to not power up some times and work fine other times. I have a couple of PC MBs that just do not like standby/hibernate/sleep modes and won't recover properly.

    Do you have to turn the PC off from the front panel soft switch or the hard switch on the power supply case?

    Check your BIOS and windows power management settings. You will select what happens when the soft switch is pushed on the front (sleep, hibernate, etc) and what functions will wake the PC up (keyboard, mouse, lan, etc).

    My "good" computer will only wake up from the keyboard even if I set it to wake on mouse movement.
     
  8. Electronic Punk

    Electronic Punk Administrator Staff Member Political User Folding Team

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    Yeah I would start by checking to see if you can find a bios update.
     
  9. kcnychief

    kcnychief █▄█ ▀█▄ █ Political User Folding Team

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    Doesn't sound like it is reaching POST, but could be - original description doesn't really say.
     
  10. trukkmann

    trukkmann OSNN Addict

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    I have one of these and they are good for testing if your PSU is dead, but wont help much if your PSU is weak. You have to test under load using a multimeter, like described in this guide...
    http://www.devhardware.com/forums/p...a-multimeter-how-to-use-it-to-test-75111.html

    I second the suggestion of a BIOS update, although if no hardware has changed and this problem just started occurring I would be leaning more toward a bad/weak OEM PSU. The FSP PSU I posted a link to has 2 12v+ rails, each at 18a. Even if your PC would never use that much it is better to have it than need it. It ensures steady, clean power to the system.

    EDIT: Keep in mind flashing the BIOS is risky, if the power is interrupted (like from a bad PSU) your system may be rendered completely unusable.
     
    Last edited: Dec 23, 2008
  11. kcnychief

    kcnychief █▄█ ▀█▄ █ Political User Folding Team

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    I have seen testers that can measure the quality of the lines as well, not just if it's dead. I would agree that a multimeter is best, but not sure how much those are going for these days.
     
  12. trukkmann

    trukkmann OSNN Addict

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    I have a Sears Craftsman auto-ranging digital multimeter, which reads AC and DC volts, amps and milliamps, ohms (continuity), capacitance, duty frequency and even temperatures that was only $40, similar to this one http://www.sears.com/shc/s/p_10153_12605_03482344000P so they wont really break the bank, and are a good investment. I'll be interested to read how this issue hashes out.
     
  13. Gigabot

    Gigabot OSNN Senior Addict

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    Thanks for the replies everyone! trukkmann, I really hope there's not a problem with the PSU but I'll definitely get a new one if I have to.

    LeeJend there is a rectangle shaped power switch on the top of my HP Slimline PC case. I have to press on that and repeatedly turn it off and on till my computer starts. I'll check my BIOS next time I restart my computer and see if there's anything wrong with the settings in there.
     
  14. Gigabot

    Gigabot OSNN Senior Addict

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    I was playing around with the Power Options and I actually got the computer to resume from Sleep mode (aka Standby). I tried restarting the computer and when I do that my monitor just turns off and my computer stays on but with a blank screen.

    I tried Sleep mode again but now it won't work any more. I guess I was lucky and that's why it worked. Now my computer won't resume after I move the mouse or press any keyboard on sleep mode.
     
  15. Shamus MacNoob

    Shamus MacNoob Moderator Political User

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    I believe hibernate you press keyboard but sleep you press the power button.
     
  16. dreamliner77

    dreamliner77 The Analog Kid

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    I've had this problem before. Cold boots required multiple power cycles, almost like the components had to "heat up" before the power usage stabilized. A new PSU solved this.

    On a side note, have you added any new devices (internal, external or USB) that might be putting a draw on (what I'm sure) is a underpowered SFF power supply?
     
  17. Mainframeguy

    Mainframeguy Debiant by way of Ubuntu Folding Team

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    dreamliner's often right when he comes in to a thread late like this - and I agree with his hunch / diagnosis.

    I would recommend a Tagan PSu to you, except I recently had one die on me after what I think was about three or four years heavy use, which I regard as a little poor (at least by Tagan standards).
     
  18. Gigabot

    Gigabot OSNN Senior Addict

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    I'm convinced that it is the PSU now so I'm buying one.
     
  19. dreamliner77

    dreamliner77 The Analog Kid

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    1) Thanks MFG!!!

    2) Make sure it will fit the slimline PC.
     
  20. trukkmann

    trukkmann OSNN Addict

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