Tip & How-To about Televison & Video
This problem happens on many Mitsubishi TVs, older CRT projections, and some of the older DLP projection TVs. The flashing LED means the TV is booting up, but it should stop in 90 seconds after plugging in AC power or resetting.
The typical cause for this is bad Capacitors (caps) in the DM module. 95% of the time its the caps, but could need a new DM module. Almost always the caps are bulged like in this picture:
They should always be flat on the top, if they're bulged, they're bad. In some cases they will not be bulged but will still be bad.
In almost every case, these caps are 1000uf @ 16 Volt caps, and should be replaced with 680uf @ 16 V caps @ 105c. The caps are always solder in parts.
In the CRT projections, there are 4 or 7 of them on the DM module that sits on the very left side of the chassis when viewed from the back of the TV set.
In the DLP projections, there are quite a few more, and they are on the FMT and DM board (4 each) and sometimes 4 will go bad on the power supply. The DLPs also have some larger caps that will go bad on the power supply causing a false lamp error.
In the case of the DLP caps going bad, Mitsubishi rebuilds the "Chassis" for service centers for about $250-300 + labor required. This is typically the recommended repair for these sets as they require extensive disassembly and mechanical skill to repair.
In the case of the CRT projections, repair is quite easier and can be repaired by people with some mechanical know-how and basic soldering skills.
For either repair, search the web and you can usually find a tutorial with instructions and explanations like the one found here:
If you are in need of specific assistance, feel free to contact me with any questions.
Posted by thielectro... on
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