hello everyone !!! im newbie here ... i will write summary about my problem hoping to find any help from expert people ! i have Hasse laptop ( chinese product ) with Nvidia Geforce 8400M ... 6 months ago , my monitor suddenly stopped working( became dead ) and i dont know why , so i figure out that i can use an external monitor ... so , i disassembled laptop monitor and just kept the laptop semi naked ( only the bottom part without the monitor ) ... and it worked perfect ! after while , due to some heating issues ... my Nvidia chips decided the day of it death ! and whenever i start the laptop , it shows weird color ( like vertical green lines "ofcourse using the external monitor ) ! see the photo : http://img341.imageshack.us/img341/3318/img00223201301300200.jpg so , i took it to some repair shops , they fixed it . but it works by external monitor . and they told me that my Nvidia chips has heat issues and maybe the problem will return ! after 1 month , the same problem appeared ( vertical green lines with 4-bit colors ) . Same as if you have windows 98 without VGA driver ! ( it shows shit colors ) ! i tried to fix the Nvidia chip by heating gun and seriously it works again ( just did that 1 week ago ) . but today , it returned as before !!!! i dont know much about BIOS , but when i started the laptop ... it says : system configuration data updated error . 0271: check date and time settings . 0251: system CMOS checksum bad - default configuration used . i know this problem because the battery , and i fix it . but it gives me new thoughts about BIOS ! so , my question is : does BIOS affect my Nvidia card and i have to flush it ? because as i read in many posts , some people said that BIOS maybe damaged and i need to flush it again ! i really appreciate any help or any idea from you guys ! have a nice day folks ... and Thanks in advance ... P.S: sorry im not native english , if you couldnt understand any part , tell me and i will explain it ! .