Display Problem

It is possible, judging by that fact that pressing down temporarily fixes it, that the video cable for the screen (I'm assuming this is a laptop?) has come loose. Pull off the keyboard and try reseating the cable, that may help.

lcd cable need to purchase another one on ebay fixes mines all the time

How old is the laptop? I have an Inspiron 8200 that does NOT travel - sits on a desktop. Elsewhere on the web people have complained the problems start at about 3-4 years. After 5 years mine has just started to have display problems (geometric color patterns or lines of blue, sometimes green, sometimes pink).

Local repairman says it's the display card OVERHEATING. He reseated the card and it worked fine - for a day. Then it went out again. Long term HEAT may be taking it's toll on these cards. Dells "refurbished" replacement card is $201. Others on the web are $75-$150. Becareful buying a replacement: my original is a ATI Radeon 9000 - can't find it anywhere. Nvidia GeForce4 440Go is available, but elsewhere on the web said to be less reliable. Then there's the problem of getting a supplier to tell me if "NEW" means never used, or pulled from a new laptop, or refurbished, or used, but tested. Good luck