When there is no ram I get the no ram beeping error, when I insert the ram it doesn't do anything, opening it up the cpu fan tries to spin but won't go on for more than 3 secs 1st led is always on and 2nd led lights up for a second or so, 3rd and 4th don't turn on. I tried a lot of things, no ram, 1 stick of ram, removing and reseating logic board and PSU.
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Most likely your power supply has gone bad. That would answer why you don’t get POST tones when you try to start up. Your diagnostic LEDS are probably only showing #1 lit. It may not even light.
Reemplazo de la fuente de alimentación del iMac Intel 27" EMC 2429
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Well I’ve got some bad news for you Apple won’t fix your system so forget going to the Apple Store (your system is on the Vintage-Obsolete list).
Instead try one of their authorized service centers or try an independent Apple repair person,
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I have an appointment at an apple store but don't want to pay more than I paid for the Mac lmao
- de Kevin Cen