1080i connection has green hue

https://www.completeservicemanuals.com/mitsubishi/crt-projection-television/vs-60805-service-manual/prod_217.html Above is a your service manual, a must have to do anything to fo with the focus. also below is a training manual, this will show you how it all works and how to troubleshoot.

http://www.tvtechcenter.com/board/links/goto/86-training-manual-for-a-mitsubishi-v20-chassis/

Since this is an older first generation (1999) HD TV it may not be compatible with newer HDTV receivers because the standards back then were different - Make sure the HD cable box is plugged into the HD component inputs on the back of the TV (not the DVD inputs) and that the menu setting on the TV is set to DTV (not RGB) video. This TV will only accept 480i and 480p signals on the DVD input. Also the HDTV input will only accept 480i,480p and 1080i (it will not work with a 720p signal,make sure your cable box is not set to that mode)

What you probably see is a burning area due to Cooling Fluid leaking from one of the CRTs. If this is the case, It is not worth fixing in my opinion because the Board would have to be replaced and the leaking CRT would also have to be replaced. The availability of the Board is doubtful Due to it's age. You can check at 1800-553-7278. This is Mitsubishi's parts department #.
Hope this helps,
Skyassoc

I had the same problem with the same model. If you pull the cover off the speakers in the front , then the small black panel. looking from the front past your lamps are the 3 main boards, the r/h board has wire jumpers connecting to the center board. The set that is closest to you had a bad/loose/corroded connection on mine. All I did was resecure connection(try moving them with your fingertip) and turn TV on and check.

The convergence amps will have number on them starting with STK replacing thes may do the trick or you may just have a poor solder connection at these ic's try soldering them first if no go then replace them look around on the convergence amp cba on the bottom for obviuos bad connections small ring crack are hard to see these ic's work hard that is one reason for their large heat sinks running the set and turning it on and off may have induced fine ring cracks. i amsorry I dont have a schmatic for this set but the ic's do have their (generic) part number wrote on them as do most all transistors and diodes and ic's

you have to make the alignment for all 3 formats....standard....1080i...and 480i

make sure that you have your HD source hooked up to the correct input on the tv. you are going to want DTV as the input.

sounds like u are losing green? is that right. could be loose connections somewhere because it works at start up then fails when it heats up. Look in the yellow pages for a mitz auth servicer or call mitsubishi for one near u.

yea you have to call a tech to make repairs to your tv it is having problem in the color circuit good luck

ya this tv needs stk packs there are a lot of people inthis area that will fix it for you ie abt