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ThinkPad I9990303 Error Catch-22
ve an old, circa 1994 IBM ThinkPad 750C (with a 33MHz Intel 486SL processor) which used to work but now refuses to boot with error I9990303. The error prevents the laptop from booting normally and also prevents it from entering the BIOS setup program, which is fairly unusual—many other errors forcibly enter the BIOS setup.
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