This may be obvious but maybe I missed something...
When you added the RAM, did you take out the processor daughter card (it's got that funky heatsink appendage thing with it) to access the bottom RAM slot? If so, you have to be very *firm* when reslotting the processor.
You may feel like you are going to break the darn thing, you will feel very queasy but don't break it!
If not, the other possibility is the CMOS battery. If you just got it second hand and it's not booting up period, unplug the CMOS and charge the battery. And see if it'll chime to startup.
PM me with specifics if you need, and I'll try and help.
When you added the RAM, did you take out the processor daughter card (it's got that funky heatsink appendage thing with it) to access the bottom RAM slot? If so, you have to be very *firm* when reslotting the processor.
You may feel like you are going to break the darn thing, you will feel very queasy but don't break it!
If not, the other possibility is the CMOS battery. If you just got it second hand and it's not booting up period, unplug the CMOS and charge the battery. And see if it'll chime to startup.
PM me with specifics if you need, and I'll try and help.