'''Connect to an external monitor'''. ''If you see the same lines on that screen it points to a VGU/VGC (logic board) problem. ''
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'''Connect to an external monitor'''. ''If you see the same lines on that screen it points to a VGU/VGC (logic board) problem. '' The heat and fans lead me to think this may be what's going on but best to connect to an external monitor to confirm or deny that supposition.
If the external screen looks normal it would point to an internal video chain problem. Run [http://support.apple.com/kb/ht1509|AHT test] 2 or 3 times to see what problems it finds. Record any error messages it reports - come back here with them.
''If this Answer is helpful '''please remember to return and mark it '''Accepted.''
'''Connect to an external monitor'''. ''If you see the same lines on that screen it points to a VGU/VGC (logic board) problem. ''
If the external screen looks normal it would point to an internal video chain problem. Run [http://support.apple.com/kb/ht1509|AHT test] 2 or 3 times to see what problems it finds. Record any error messages it reports - come back here with them.
''If this Answer is helpful '''please remember to return and mark it '''Accepted.''