I've been destroying & fixing computers since 1983... yes I used Dell, dell, DELL, dEll, dELl, DELl, delL, DeLl, DeLl, D3LL, D311, n5050, N5050, n 5050, N 5050, n-5050, N-5050, n_5050, N_5050, inspiron, Inspiron, INSPIRON, InSpIrOn... I think you get the picture.
I've dissasembled 14 non-working laptops & gave them back to customers in like new working order. To date, the Dell's (3 for failed hard drives, one to upgrade the wireless card from G to N) have been easiest to dissasemble for me averaging about 20 minutes apiece. Based on the Dell's own field tech tear-down guide, I could probably tear the laptop appart & put it back together in under an hour, even with the damned keyboard not wanting to come loose... $150 is a rip-off.
My primary concern is protecting the factory warranty (only 284 days remaining, but a lot can happen in 284 days...), dissasembly of the laptop by anyone not authorized by Dell (me), voids said warranty. Therefore, I was trying to see of anyone (forum readers), knew of a keyboard shortcut to reset BIOS (like some desktop motherboards have), since there's nothing listed at Dell.
Basically, what I'm going to do at this point, is hand the laptop back, & tell her to call Dell & explain the situation.