One time, there was some sort of error and the computer shut off. It would then notn turn back on - no sign of life whatsoever.
For the 2nd laptop, a different time, I was installing a larger hard drive and more RAM on a working computer. I installed them both at the same time, and then attempted to boot from a CD.
For the 1st computer, I couldn't figure out how to get it back on. I randomly decided to remove the battery. It then started up on AC and after putting the battery back in and testing it, it worked fine. The HDD had failed and the OS wouldnt fully load. It basically froze on the desktop. I replaced the hard drive and it runs fine now.
2nd Laptop: I went to turn it on to boot the OS cd, and I got some noises and a blank screen. Nothing. Power cycled and still nothing. I was flipping out - $1000 computer. I tried everything. Installed old HDD, still the problem. Put the original RAM back in. Nothing. I didn't know what to do. Anyway, my problem (after I THANKFULLY on a whim figured it out) was solved by putting original components back in PEREFECTLY as before and REMOVING THE LAPTOP BATTERY.
Does anyone know why removing the battery fixed such an error?