crwdns2933423:0crwdne2933423:0

it stops at turn on

the screen is always black and the fans go very quickly

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 -1
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crwdns2933313:01crwdne2933313:0

crwdns2934057:0crwdne2934057:0

This is the "panic mode". The computer doesn't know what to do and revs up the fans as a safety measure. Usually, with these line of Macs it boils down to a faulty graphic chip and/or bad caps on the logicboard. Please read the other posts related to this problem.

crwdns2934105:0crwdne2934105:0

crwdns2889612:0crwdne2889612:0 1

crwdns2942205:01crwdne2942205:0:

+ do a search for "capacitor"

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pietro crwdns2934231:0crwdne2934231:0
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crwdns2936751:024crwdne2936751:0 0

crwdns2936753:07crwdne2936753:0 1

crwdns2936753:030crwdne2936753:0 12

crwdns2942667:0crwdne2942667:0 875