Hi all I'm new to this forum and I just want to see if anyone had this problem before and how did he fixed it?! So, I have an iMac A1418, opened it to upgrade SSD to 1TB and after putting everything back in place I get a lit up screen, no apple logo and continuous chime... I already tried the following: 1. PRAM reset - still not working 2. Battery change - still not working 3. Flex video cable change (because I noticed that when I unplug that and start the iMac, I get only one chime, but obviously no video) - still not working (picture attached with flex cable I changed) 4. All 4 green LED's on the board are on so it's not a graphics problem, ram problem... I'm just about to throw it out the windows because it's driving me mad, so any suggestions are greatly appreciated! Many thanks! Catalin T.