I also have a 1521 dell and no startup and the caps key blinks 45 times then computer shuts down. I have taken out the ram and cleaned and relaced. I only have space for 1 ram chip.. I've heard that there is ram under the keyboard? is that correct?
Ok, decided to disassemble this labptop and find out what was going on. and there is in deed a 2nd ram chip that is located under the keyboard. after many attempts of cleaning and reseating it, finallly got the computer to come up. using both the ram chips. so I answered my own question above as there are 2 1gb ram chips on a inspiron 1521. Hope this helps someone else wth the problem of blinking caps (45 times).
Oh I had no problem booting up the computer leaving that ram out under the keyboard. Must have been real dirty as I used tuner wash to clean it out.