... laptop motherboa PN/For HP TX2500 480850-001 laptop motherboard TX2500 480850-001 AMD CPU, HF-G6150-N-A2 ... ,firstly,pls make all the hardware installed well or in good condition, such as CPU,RAM stick ... , pls make sure every connectors are installed well or stable. 4,As you are install cooling system, ... put the cooling paste or special Silicagel on VGA-card,Northbridge and CPU. ...