I have a Maxent MX-42x3 plasma TV. P420542HM8. It takes a long time to warm up. At first the screen is black. As it warms up the screen flickers...at first a lot, then as it warms up the flickering gradually subsides until finally in about 3-4 minutes the screen works normally. After research, I have found several probable fixes. 1) Replace the image board..$350+- part cost. This upgrades the firmware version from 15 to 22 and appears to have worked in 2005 for a fellow. 2) Replace the SU board (U) DPWB-0163-1G-P I think? $65 part cost or 3) SSboard (X) DPWB0159-1G-PA which will cost $135 parts. Which of the 3 ways seems most probable to fix it? Can I fix it w/o buying the board? These seem to be poor units but if the fix is cheap, I'd like to fix it.