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Stick the DVD in that came with the machine (Apple Hardware Test), and boot up holding down the D key...
Summary
Apple Hardware Test is a comprehensive suite of test utilities, designed for advanced troubleshooting of hardware issues on Macintosh computers. It's provided on bootable optical media and used by holding down the "D" key while the MacBook Pro starts up.
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For coding work - hit me up on andy // borkedcoder // com
(consider figuring out the email as test #1)
All models are wrong, but some are useful. George E.P. Box. p202
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