Trinitron KV-36FS100: What did I do??

[YamahaFreak]

Okay, this one was given to me by a neighbor and the plan was to have it replace a Sharp 32" flat CRT with a very weak picture tube. The sony was working fine upon receipt, if not a tad fuzzy. (adjust flyback) I opened it to clean it out, and removed and replaced the CRT board to clean it. When I powered the set back on, the screen blanked once and when it came back up, the picture was horribly dark, very out of focus, and discolored. The standby led is also flashing five blinks, which I have never seen happen with a set up and running. Occasionally, the screen goes blue with lines that look like what usually appears when the G2 on the flyback is turned up way too high. After several minutes of operation, the screen goes darker and darker, until it is almost black. The blinking LED persists after I turn the set off. I am very confused...