While working on my computer, the monitor suddenly displays no signal and then it goes off even the computer is running but no display.
It happened to me 5 times.
What could be the problem?Could you give us some more details please?
Your system specifications would be very helpful, also did anything change or did you do anything before this problem started?OS: Windows 7 (64bit)
RAM: 3GB
Processor:  Pentium(R) Dual-Core  CPU      E5800  3.20GHz
HD: 500GB
Computer manufacturer is HCL

I dont know how it starts but i tell you that it happend to me frequently when i run Zune software,
you may be thinking that zune may be the problem but not in fact, this problem started earlier before installing zune.Alright, thanks for the additional info.  Could you also please get a report from Speccy and post it here?  That will give us more in depth detail about your computer.  It's likely to be either a graphics driver or graphics card problem, but to direct you further we'll need the full specifications of your machine which Speccy can get easily.Operating System
   Windows 7 Ultimate 64-bit
CPU
   Intel Pentium E5800 3.20GHz   40 °C
   Wolfdale 45nm Technology
RAM
   3.00GB Dual-Channel DDR3 399MHz (6-6-6-15)
Motherboard
   ECS G41T-R3 (CPU 1)   30 °C
Graphics
   HCMELWBN11 ([email protected])
   Intel G41 Express CHIPSET (Elitegroup)
Hard Drives
   466GB Seagate ST3500413AS ATA Device (SATA)   38 °C
Optical Drives
   TSSTcorp CDDVDW SH-S223C ATA Device
Audio
   High Definition Audio DeviceGraphics
      Monitor
         Name   HCMELWBN11 on Intel G41 Express Chipset (Microsoft Corporation - WDDM 1.1)
         Current Resolution   1366x768 pixels
         Work Resolution   1366x728 pixels
         State   Enabled, Primary, Output devices support
         Monitor Width   1366
         Monitor Height   768
         Monitor BPP   32 bits per PIXEL
         Monitor Frequency   60 Hz
         Device   \\.\DISPLAY1\Monitor0
      Intel G41 Express Chipset
         Manufacturer   Intel
         Model   G41 Express Chipset
         Device ID   8086-2E32
         Revision   4
         Subvendor   Elitegroup (1019)
         Current Performance Level   Level 0
         Driver version   8.15.10.1749
            Count of performance levels : 1
               Level 1Motherboard
   Manufacturer   ECS
   Model   G41T-R3 (CPU 1)
   Version   IA001507
   Chipset Vendor   Intel
   Chipset Model   G41
   Chipset Revision   A3
   Southbridge Vendor   Intel
   Southbridge Model   82801GB (ICH7/R)
   Southbridge Revision   A1
   System Temperature   30 °C
      BIOS
         Brand   American Megatrends Inc.
         Version   02/17/2011
         Date   17-02-2011
      Voltage
         +3.3V   3.744 V
         CPU CORE   1.088 V
         VIN3   2.340 V
         VSB3V   3.760 V
      PCI DataCPU
      Intel Pentium E5800
         Cores   2
         Threads   2
         Name   Intel Pentium E5800
         Code Name   Wolfdale
         Package   Socket 775 LGA
         Technology   45nm
         Specification   Pentium Dual-Core CPU E5800 3.20GHz
         Family   6
         Extended Family   6
         Model   7
         Extended Model   17
         Stepping   A
         Revision   R0
         Instructions   MMX, SSE, SSE2, SSE3, SSSE3, Intel 64, VMX
         Virtualization   Supported, Enabled
         Hyperthreading   Not supported
         FAN Speed   2529 RPM
         Bus Speed   199.5 MHz
         Rated Bus Speed   798.0 MHz
         Stock Core Speed   3200 MHz
         Stock Bus Speed   200 MHz
         Average Temperature   40 °C
            Caches
               L1 Data Cache Size   2 x 32 KBytes
               L1 Instructions Cache Size   2 x 32 KBytes
               L2 Unified Cache Size   2048 KBytes
            Core 0
               Core Speed   1196.9 MHz
               Multiplier   x 6.0
               Bus Speed   199.5 MHz
               Rated Bus Speed   798.0 MHz
               Temperature   44 °C
                  Thread 1
                     APIC ID   0
            Core 1
               Core Speed   1196.9 MHz
               Multiplier   x 6.0
               Bus Speed   199.5 MHz
               Rated Bus Speed   798.0 MHz
               Temperature   35 °C
                  Thread 1
                     APIC ID   1RAM
      Memory slots
         Total memory slots   2
         Used memory slots   2
         Free memory slots   0
      Memory
         Type   DDR3
         Size   3072 MBytes
         Channels #   Dual
         DRAM Frequency   399.0 MHz
         CAS# Latency (CL)   6 clocks
         RAS# to CAS# Delay (tRCD)   6 clocks
         RAS# Precharge (tRP)   6 clocks
         Cycle Time (tRAS)   15 clocks
         Command Rate (CR)   2T
      Physical Memory
         Memory Usage   45 %
         Total Physical   2.93 GB
         Available Physical   1.61 GB
         Total Virtual   5.87 GB
         Available Virtual   4.56 GB
      SPD
         Number Of SPD Modules   2
            Slot #1
               Type   DDR3
               Size   2048 MBytes
               Manufacturer   Hyundai Electronics
               Max Bandwidth   PC3-10700 (667 MHz)
               Part Number   DMT125U6TFR8C-H9
               Serial Number   196A01B9
               Week/year   12 / 11
               SPD Ext.   EPP
                  JEDEC #4
                     Frequency   685.7 MHz
                     CAS# Latency   9.0
                     RAS# To CAS#   9
                     RAS# Precharge   9
                     tRAS   25
                     TRC   34
                     Voltage   1.500 V
                  JEDEC #3
                     Frequency   609.5 MHz
                     CAS# Latency   8.0
                     RAS# To CAS#   8
                     RAS# Precharge   8
                     tRAS   22
                     tRC   30
                     Voltage   1.500 V
                  JEDEC #2
                     Frequency   533.3 MHz
                     CAS# Latency   7.0
                     RAS# To CAS#   7
                     RAS# Precharge   7
                     tRAS   20
                     tRC   27
                     Voltage   1.500 V
                  JEDEC #1
                     Frequency   457.1 MHz
                     CAS# Latency   6.0
                     RAS# To CAS#   6
                     RAS# Precharge   6
                     tRAS   17
                     tRC   23
                     Voltage   1.500 V
            Slot #2
               Type   DDR3
               Size   1024 MBytes
               Manufacturer   Strontium
               Max Bandwidth   PC3-10700 (667 MHz)
               Part Number   SRT1G88U1-H9H
               Serial Number   193E0000
               Week/year   15 / 11
               SPD Ext.   EPP
                  JEDEC #4
                     Frequency   685.7 MHz
                     CAS# Latency   9.0
                     RAS# To CAS#   9
                     RAS# Precharge   9
                     tRAS   25
                     tRC   34
                     Voltage   1.500 V
                  JEDEC #3
                     Frequency   609.5 MHz
                     CAS# Latency   8.0
                     RAS# To CAS#   8
                     RAS# Precharge   8
                     tRAS   22
                     tRC   30
                     Voltage   1.500 V
                  JEDEC #2
                     Frequency   533.3 MHz
                     CAS# Latency   7.0
                     RAS# To CAS#   7
                     RAS# Precharge   7
                     tRAS   20
                     tRC   27
                     Voltage   1.500 V
                  JEDEC #1
                     Frequency   457.1 MHz
                     CAS# Latency   6.0
                     RAS# To CAS#   6
                     RAS# Precharge   6
                     tRAS   17
                     tRC   23
                     Voltage   1.500 V



And what else information you require??

[recovering disk space, attachment deleted by admin]Thanks, that's very helpful indeed.  Just for future reference, and I should've said this at first - you can save the output as a text file from within Speccy, and you could've attached it to your post, it just would've saved you a little bit of time.
Not a problem though
So, the first thing I would advise you do is update your graphics driver, you can grab that here.  Try that, and see if it helps.How to check whether it works or not!!!
The problem occurs when it wishes... There's little point in giving you a long list of things to try, because then you'll have no idea which one resolved the issue so you won't know what was causing it.  Try one thing at a time, and see how it goes.  If the problem is infrequent, yes, it can be difficult to know when it's been resolved, but try one thing at a time, and if the problem happens again, then post back and we can try something else.So, till the problem occurs again I will be assuming that the problem has been fixed and when it occurs again I will come back.That's pretty much all you can do if the problem doesn't occur all the time...try something and see how it goes.  There's no way you can know if it's fixed until it happens, or doesn't happen.After downloading the file when i try to install it says " The computer does not meet the minimum requirement for installing the software"