I have an unknown age Dell Lattitude 620 without age or use to gauge if this is some unit that needs a new motherboard or maybe a battery. Tell a little more.
-> There is one clue and that some folk have the power settings to not turn off but to sleep and then they put the machine away. The battery is depleted and the next attempt at booting fails JUST LIKE YOUR DESCRIPTION. Let's hope it's that old issue.
Starting yesterday, my laptop acts as though it is in sleep mode (which my power settings do not allow for), but when I try to get it to wake up, pushing the power button just turns it off. Then when I try to turn it back on, the keyboard and power lights come on but there's a black screen and no sound. Then, today, after many times of turning it off and trying to turn it back on, it worked, but it said that it had to start up in recovery mode and the computer tried to revert itself to a previous, working state. Everything was fine and I used it for several hours without a problem, but then I went back to it about 3 hours later it turned black again. There is no problem with overheating, the charger works perfectly, and I think this points to a software problem as opposed to a hardware one. Any suggestions? I am running Windows vista on a Dell latitude 620.