Member Avatar for Cosmic

Here is the problem:

Computer starts fine.
Passes bios control.
Starts loading windows.

Right after the win loading and before the password login page the screen turns black and no signal is displayed.

I believe the problem has occured from an abnormal shut-down the previous day.

How can i fix this?
(Windows repair through commands maybe??)


Thanx again.
If anyone has an answer please also mail me:

Cosmic

Edited by crunchie because: Removed email address
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Brief summary: the monitor message "No signal" means the display has lost the video feed after POST but before the Windows desktop. That usually points to the video output stopping or switching at the moment Windows hands control to the graphics subsystem, or to a monitor/cable/input-selection issue. The thread already has good starting ideas from and hardware hints from ; below are additional, practical checks and recovery options not yet covered.

Quick checks you can do now (no disassembly required)

  • Watch keyboard LEDs (Caps/Num Lock) when the screen goes dark. If they toggle, the OS may still be running even though the screen reports "No signal."
  • If the F8 menu or selection does not accept keystrokes (as noted), try a different keyboard (wired USB or PS/2). Some systems do not initialize certain USB devices early in boot.
  • Try a different video cable and a different output on the GPU/motherboard (HDMI/DVI/VGA/DP). Also confirm the monitor input selector matches the connected cable.
  • If another PC works with this monitor but this PC works with another monitor (like described), focus on cable/port/monitor-input settings.

If the machine is alive but video dies when Windows loads

  • Try a blind sign-in: type your password and press Enter, then press Win+P and use the arrow keys to cycle display output modes (this can restore output if Windows is sending output to a different display).
  • Boot from recovery or install media and run an offline health check. From a recovery command prompt you can run:
    chkdsk C: /f
sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows

    (These commands apply to Vista and later. Use System Restore or Startup Repair from the recovery environment if available.)

If those steps do not help, collect this info before opening a new thread: PC make/model, GPU model, monitor make/model, cable type, single/dual monitors, exact symptom timing, BIOS beep codes, and whether external video (TV) shows the same failure. Include what you tried and any LED/beep activity.

Recommended Answers

All 7 Replies

Member Avatar for MartyMcFly

You need to boot into safe mode, by pressing F8 at startup throughout POST (Power on self test, the bios crontrol bit), selecting Safemode from the list, (could always try "Last Known good configuration" as well),

If it boots into safe mode, a low res edition of your normal OS, it may be one of two things

Either you have set your Resolution / Display Settings outside that capable of your monitor, (which is hard to fix without VGA Mode), or your graphics drivers are bad.

Look to sort both out by unistalling current graphic drivers in safe mode, rebooting into normal mode, and installing some new ones.

To unistall old display drivers, go to control panel - system - hardware tab - device manager button. Then expand "Display adapters" by clicking on + symbol, then right-click each graphics driver entry and select uninstall.

Let us know if that helps.

Member Avatar for adyc_05

,mkljlkm m l

Member Avatar for Ste121

You need to boot into safe mode, by pressing F8 at startup throughout POST (Power on self test, the bios crontrol bit), selecting Safemode from the list, (could always try "Last Known good configuration" as well),

I have pressed F8 and got on to the screen where it says safe mode.

when i try to select one of the options from this page nothing happens. i am not able to move the highlighed thing to select te option i want? all that happens is the timer runs out and then the screen goes on to saying No Signal?


What can i do to sort this? i am not able to get on to my log in screen because it goes to no signal before then. and i am not able to run in safe mode because i cannot select a option

Please Help!!!

Member Avatar for Bob_180_Bob

Hi,
Welcome to Daniweb, you have jumped on a thread that is very old (Sep 1st, 2005)
Try this....
Open your computer (I assume a desktop) and ensure that the power is removed from the supply at the wall. earth yourself to the case of the computer, remove all RAM sticks, clean the contacts of one and insert into one slot, try computer again, if still the same try the other stick (or the same) in a different slot. Ensure that the machine is dust free while you are there.
If you are still having problems, start your own thread here and supply a lot more information about your computer, operating sys and your problem.

Member Avatar for elug13

You need to boot into safe mode, by pressing F8 at startup throughout POST (Power on self test, the bios crontrol bit), selecting Safemode from the list, (could always try "Last Known good configuration" as well),

I have pressed F8 and got on to the screen where it says safe mode.

when i try to select one of the options from this page nothing happens. i am not able to move the highlighed thing to select te option i want? all that happens is the timer runs out and then the screen goes on to saying No Signal?


What can i do to sort this? i am not able to get on to my log in screen because it goes to no signal before then. and i am not able to run in safe mode because i cannot select a option

Please Help!!!

Hi, it looks like I have the same problem:
Right after the win loading and before the password login page the screen turns black and no signal is displayed.

I believe the problem has occured from an abnormal shut-down previously. Please, HELP!!!

Member Avatar for Bob_180_Bob

"Hi, it looks like I have the same problem" "If you are still having problems, start your own thread here and supply a lot more information about your computer, operating sys and your problem."
What part of "start a new thread" did yo not understand?

Member Avatar for rajesh mahajan

my cpu works on another monitor but when i connect cpu to my monitor it shows on seceen that no nignal has come on monitor. what is the problem?

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