How can I get rid of lines of red dots horizontally across the monitor screen

[Richard_M_3]

Hi

I recently purchased a computer in Sep 2012. with an Intel i5 3570k processor (not over clocked) which has no additional graphics card and runs using the on board graphics HD 4000. I am sure there  is nothing wrong with the monitor or connection to the desktop pc. and the lines of red dots didn't appear immediately when I first had the pc. I wondered if they began to appear once I started updating my pc with the latest windows 7 updates (x64 bit). 

The red dots appear each time I switch on the pc at the very bottom edge of the screen then when the Asus screen appears (motherboard is Asus p8z77-V LX) across the middle of the screen, then again when the windows  start up screen appears and then again if have an image in the centre of the screen which is a dark block. The line of dots only appears horizontally and in red on dark screens. Occasionally I have seen the same lines of dots on a light coloured block in the centre of the screen when the dots are pale blue.

Any advice on how to remove these dots would be gratefully appreciated.

Many thanks

Richard

[Bernard]

Probably driver related issue.

[Developer_Tribe]

from the info it seems both your pc and monitor is okay. but i can be wrong.

first - change your vga or hdmi cable

second  - hardware issue - RAM  or/and Graphics Card

RAM - if you have two or more DIMMs - try running with one, if it dosen't work, run with the other one(s)

Graphics Card - if you have an extra graphics card PCI or PCI Express, try running your graphics with it.

[Bernard]

The best and quickest attempt to understand this could be dumping frame buffer and reading pixel values.There is also possibility of faulty lcd screen.In general debugging GDI/GDI+ or DirectX issues is not so easy.