Distorted screen on occasional startup

I just bought a new computer a week ago, but sometimes when I turn it on, the screen is distorted as shown in the attached files. I am able to use the mouse and keyboard, but the screen is not displaying well.

The monitor and display adapter drivers are updated.

Here are the specs:
OS Name: Windows 7 Home Premium
System type: 64-bit OS
Manufacturer: ASUSTeK Computer INC.
Motherboard Model: ASUS CM6850
Motherboard Chipset: Intel H67 (Cougar Point) [B3]
Processor: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz 3.40GHz
RAM: 8 GB
Video Card: nVIDIA GeForce GT 520 (GF119) [AsusTek]
Video Chipset and Memory: nVIDIA GeForce GT 520 (GF119), 2048 MBytes of DDR3 SDRAM
BIOS Manufacturer: American Megatrends

Monitor Name: LG W2053 (Analog)
(Monitor bought separately a year ago)

I would appreciate any help with the problem.

Thanks for the quick response. I will borrow another monitor and see if the startup problem still occurs.

fredcoupon said:

I just bought a new computer a week ago, but sometimes when I turn it on, the screen is distorted as shown in the attached files. I am able to use the mouse and keyboard, but the screen is not displaying well.

The monitor and display adapter drivers are updated.

Here are the specs:
OS Name: Windows 7 Home Premium
System type: 64-bit OS
Manufacturer: ASUSTeK Computer INC.
Motherboard Model: ASUS CM6850
Motherboard Chipset: Intel H67 (Cougar Point) [B3]
Processor: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz 3.40GHz
RAM: 8 GB
Video Card: nVIDIA GeForce GT 520 (GF119) [AsusTek]
Video Chipset and Memory: nVIDIA GeForce GT 520 (GF119), 2048 MBytes of DDR3 SDRAM
BIOS Manufacturer: American Megatrends

Monitor Name: LG W2053 (Analog)
(Monitor bought separately a year ago)

I would appreciate any help with the problem.

The only time I have seen the display appear like your attachments is when a monitor was failing. There could be other reasons, but that's the only time I have seen it.

I bought a new Dell monitor but that didn't solve the problem, so I just returned the computer and replaced it with a new one. Unfortunately, I'm having some problems with that one too, posted here

Thanks for your help though guys.