compaq presario cq40 not switching on and no power and charging,not even power led is blinking which is integrated in power jack..i took a visual look there is one burned capacitor near battery connector i changed that but stil laptop is in same condition.can anyone plz tel me that how to find and fix a fault is laptop dead,i m a poor guy and earn money by repairing computers this is a only way to earn money for me...plz sumone help me i will be really very thankful to him..
pls change the bios of cq40 your problem will be solved
sir, me too got the same problem, does changing the bios solve this?. the bios ic or just the battery? huhu, i'm so noob in repairng.