I, I have this oldish but great Thinkpad A20p laptop that started behaving funny recently, sometimes stopping at the ibm logo, sometimes starting smoothly. At the moment, however, won't go past the logo with, at the bottom: "Press F1 for IBM Bios setup Utility" and "Press F12 to choose temporary boot device" [Picture1]. If I do F1 or F12 won't go anywhere. If I click "escape" I get the screen telling me what kind of Pentium I have, how much ram and sram, system bios and video bios shadowed and again press F1 and F12 but nothing happens; and that's all [Picture2]. I even changed the bios battery but reinstalled later the old one because nothing changed. What do you think the problem could be? Thanks in advance.