When i switch on my computer nothing is shown on the screen

laptop monitor need to repair

I have a cybershot DSC W55. When the power button is switched on the lens extends and the "access" message shown on screen. Also amber light is flashing above screen. After a few seconds I get a message to power on and off again. I\'ve tried switching on and off a few times, removing battery pack and memory card, but nothing seems to be solving the problem.

If your PC turn on but there is no display, It may be your Graphic card or your memory.

Nothing to worry, Open your laptop from the back side.Remove the RAM  and reinsert it.

Your system will work fine.

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Try cleaning the RAM like shown in the image below.
Hope this helps

Refresh all the connections to the motherboard and clean the RAM like shown in the image below.
Hope this helps

Go to my computer and double click on the camera icon to open it.

bad video card

I would suggest try rebooting in SAFE MODE and the right clicking with the mouse on the screen go to properties then setting and change the area of the screen