Managed to get a L512 back to life with oven reflow, but now bios locked ??

Hello,
Just joined, but been lingering a bit longer here.
Got my hands on an L512 the other week with the dreaded 'DEAD"-symptom (doesn't respond to power on, yet charging the battery without problems). SImiliar to this stuff :
http://forums.lenovo.com/t5/ThinkPad-Edge-S-series/Edge-E520-will-not-turn-on/td-p/746183/page/10
Anyway, figuring I got nothing left to lose I decided to go for the old oven reflow trick. Skeptic at first, but after 7.30m in the oven at 190 degrees celcius (375f) and cooling down for 15 minutes, much to my surprise the laptop turned on again !!
But.. it's now asking for a bios password. I can get into the bios, by pressing F1 and then just enter, but it says it needs a supervisor password to actually save anything. Only thing I can do (apart from viewing all the options) is choosing restart, at which point I will be presented with a Hit F1 to enter setup message and then the password is needed once again..
I've read here and there that taking out the bios battery was a bad choice, but leaving a battery into a preheated oven at 190 degrees celcius seems even less smart..
So now I'm here. Asking for your help, and hoping Lenovo has got some password resetting procedure which does not constitute of replacing the entire motherboard..
Moderator Note: Post edited per forum rules.
And my soldering skills are upto par, but does it really have to come to this ?

Something is wrong here. Reflowing will not create a password, and the lead-free solder in the L512 won't melt at 190C

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Managed to get a L512 back to life with oven reflow, but now bios locked ??

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