Chosen Solution
This iMac, what does the light on front mean? See in picture. Thanks Update (03/26/2018) Hi Dan, I got it in this state. Two test led come on so the power supply is working. But led no3 never comes on. The capacitors have some orange crust. I removed and backed up the good hd. Any ideas? Thanks
This series was at the time of the Capacitor plague Sadly your power supply needs to be replaced or find someone who can replace the bad caps.
