Color the picture on my mitsubishi WD 52525 seems dull and dark how can i fix this? what is the best picture setting for this tv?

go to menu...correct brightness

Projection sets have two very common problems.

The first common problem is convergence


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

These sets have several common problems which are listed below.

Problem #1) Convergence

Yours may have one or more of the following symptoms

• Screen Looks 3-D
• Colors wont align
• Screen may look distorted or warped
• No Audio/Video - makes a chirping sound.

Problem #2

Another common problem is dull or washed out video.
Your TV may have one or more of the following symptoms....

• Dull looking picture
• White looking picture
• Halos around objects
• Red/Orange looking picture

You can see some more examples and find the fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

The green CRT's (color picutre tube or color wheel, or ballast) will need to be tested for replacement.
It is quite common with these tv's

You will need an ohmmeter and or voltmeter and test each component for currency and accuracy

Are you sure its the TV and not the source? Are you sure its only the HDMI port on the TV? The only reason why you must HDMI is to get 1080p and your TV doesn't support 1080p. Its supports up to 1080i. Your TV has a native resolution of 720p which means it can accept a 720p image and not need to scale it, so the picture will look the best at 720p but will support 1080i. I would use component cables to connect your sources and set them to output 720p. 

Have we solved this problem?

Good Day;
You may have a lamp going bad,when was the last time you replaced it? Or the DMD or light engine, try lamp first. Good Luck, big IRISH.

You would need the service manual for that adjustment. It is outlined in the service manual on how to adjust the tilt. It is a mechanical adjustment. You can get the service manual emailed to you instantly after purchase at this link.
http://servicemanuals.vstore.ca/

maybe the lamp

. Suspect the FMT PCB part # 930B924002. Supect the DM PCB part # 934C116002 if green tint