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My compaq series 992140 laptop computer will not turn on.I have a brand new battery charged up in it and the wall plug has a little box in line with a little green light that stays on when it is plugged in. But no lights on the computer stay on at all now.

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  • timothywi157 Jul 23, 2009

    I tried what you suggested and the laptop does come on with only the battery in it and with the plug in, however a little message come on the screen that says"1782 disk controller failure". All the lights work on the laptop now. Then the screen goes blank and a message says "touch any key". I did that but the screen stays blank.

  • timothywi157 Jul 23, 2009

    I didn't open the keyboard. How do you reset the bios?

  • timothywi157 Jul 23, 2009

    It still says non system disk error on the screen.

  • timothywi157 Jul 23, 2009

    Yes, the hard disk is showing. But the same message swows up on the screen when I restart the computer-"non-system disk or disk error"



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Do me a favour. Try disconnecting the battery and the power supply completely. Wait for a couple of minutes. Do not connect the battery. Connect the power cord to the laptop first and then to the wall socket. Now try turning on the PC. If it works perfectly, shutdown and disconnect the power supply. Now plug in the battery and turn on without connecting the power supply to the AC socket. Please report back as to what happens in each scenario.

Posted on Jul 23, 2009

  • 6 more comments 
  • Amruth Louis Jul 23, 2009

    Go into the BIOS setup and check if your Hard Disk is detected. Did you try opening the laptop casing?

  • Amruth Louis Jul 23, 2009

    Also try resetting your BIOS

  • Amruth Louis Jul 23, 2009

    The BIOS setup key is usually F2 or F4. But it varies with the laptop model and the BIOS software. When you turn on your laptop, you'll find the setup key in the first screen that appears in DOS mode. Tap the key until it goes into the BIOS setup. Go to hardware tab and check if your Hard Disk is detected. If it is, then on the Exit tab you'll find Reset BIOS settings. Press enter and reset the BIOS. Let me know what happens.

  • Amruth Louis Jul 23, 2009

    Is your Hard Disk shown in the BIOS setup?

  • Amruth Louis Jul 23, 2009

    If your Hard Disk is not listed in the BIOS setup, you'll need to open the Hard Disk bay at the back of your laptop to make sure the cabling is proper and not loose.

  • Amruth Louis Jul 23, 2009

    Is your Hard Disk LED blinking? Also allow your system to be in that state for around 10 minutes and check if your hard disk heats up abnormally. Actually when in that state your hard disk should not be spinning.

  • Amruth Louis Jul 24, 2009

    Did you check your hard disk?

  • Amruth Louis Jul 24, 2009

    I'm waiting for your progress.



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