When i start my pc, i get a patchy display on the boot screen and the windows loading screen. The effect is like scratch marks on the display in small, square clusters and they cover most of it. Although once in windows itself my display looks fine (only when i turn the hardware accelaration down one click) but i get some serious exceptions when i have my hardware accelaration at full. These range from ; a sort of shadow/ghost near the cursor at all times,serious patchiness in pictures, videos and programs such as google earth/maps. Also if i try to watch a video within say,5-10 minutes of starting my pc, i experience serious display issues that can only be described as a green mish-mash of blobs. I have learned to live with this problem but would be very grateful if any one could help.
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most of the time on older monitors you can set the refresh rate in safe mode and that will, most of the time, resolve the problem otherwise time to purchase a newer monitor.
Video issues like you describe can only be two things in hardware either a Video card, or display. Patchy display is typically a bad display that has been dropped or damaged. On the software side a new driver or update can cause image problems but typically it will be no display vs. patchy display.
Boot into safe mode ...not sure what windows version you have but Google boot with safe mode with windows version windows 10, 7 XP etc
You should see the bios before windows loads. If it turns black when windows is loading bad DIsplay settings or driver.
mscam ... Microsoft Camera... Hmm make sure you have disconnected all items from your system... try to boot up in safe mode... if that doesn't work you will have to do a repair with a Windows cd... do not do a repair with the internet software... last resort reinstall windows
The startup of windows has been corrupted due to a virus or other operating system errors. You will need to reinstall the operating system and start from scratch.
Beware This Method ERASES everything on your computer.
When you press the Power button to start the boot process, the LED lights glow while the computer verifies that there is sufficient electrical power to activate the hardware.
Effect
& Solution: When you press the power button, the LED lights on the
computer do not glow or the LEDs blink briefly and then stop. There is
no sound of the fan or hard drive spinning, and the screen remains
blank. The computer will not start if there is insufficient battery or AC adapter power.
The BIOS queries various hardware components used for the startup boot process.
Effect
& Solution: When you press the power button, the LEDs glow but
there is no fan or hard drive sound. The LEDs may glow briefly and then
go out.
Or
The LED lights blink, stop, and then blink a
second or third time, but there is no sound from the computer and the
screen remains blank. The sequence of the blinking lights indicates a
specific error code.
Or
A series of beeping tones is heard. The sequence of beeping tones indicate a specific error code.
If
a hardware component has recently been replaced, or if the PC has been
jarred or shaken, there may be a loose connection to the memory chips
or hard drive which prevents the computer from starting.
The BIOS loads the basic input (keyboard) and output (advanced LEDs / display screen / boot drives) devices into memory.
Effect
& Solution: When you press the power button, the LEDs glow, the fan
or hard drive sounds, are heard, but then the boot process stops and a
black screen - with an error message - displays.
The boot check has detected a communication error or conflict with a hardware component that must be corrected.
The BIOS loads the Windows operating system and starts the services
that allow low-level control of all of the background operations.
Effect
& Solution: When you press the power button, the LEDs glow, the fan
or hard drive sounds, are heard, the HP or Compaq Logo displays on a
black screen, but then the boot process stops and a blue screen - with
an error message - displays.
The boot check has detected a hardware driver error or a software conflict that must be corrected.
Control is transferred to the Windows loader to initiate the display of the advanced settings in the Windows environment.
The Windows logo displays during this step.
Effect
& Solution: When you press the power button, the computer performs
all the steps in the boot process, but after the Windows Logo displays,
the moving Windows progress bar or the rotating cursor stops moving and
the boot process stops.
An error message may display on a screen with the Windows logo. In some instances, there is no specific error message.
Or
A black screen appears and the computer attempts to restart.
The Windows self-check has detected a software conflict that must be corrected.
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