Please Help! Need more help with my Mitsubishi WS-55859

After having the  green blinking light, I was able to fix that by replacing the seven 1000uf 16v caps on the DM board. But now, it powers on, looks good, and powers down by itself. The green light cycles through and stops and it will power back on everytime. Anyone have any ideas on what to look at next?? Convergance?? Fuses??? Thanks for the help, Jeff