20 Most Recent Hitachi 50UX57B 50" Rear Projection Television Questions & Answers

in the menu , the display or video settings should have different video display settings such as 16:9 , 1:1 , 14:9 ect... these will change the video display to different sizes

Sounds like your convergence modules have gone bad. They have 21 close spaced pins to unsolder and resolder. You'll need a soldering iron with a fine point tip and thin gauge solder to do the repairs yourself. Solder bridges between pins are common when soldering these module pins, so have some unsoldering wick handy if you're going to fix it yourself. You can get parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

You probably have a blown 2kV capacitor and 2 amp fuse. Look for signs of black burning inside.

Watch this

Replace Both of your STK ICs that will fix this they are big black ICs will have part number on them STK392-110 use 180s Mats Electronics has them 1-800-628-1118

When a black box appears on the screen it means that your closed captions are on and set to TEXT. When the closed captions are set to CC1, it puts the words on the screen and when set to TEXT it puts a black box in the center of the screen. Go into the set's menu, navigate to the closed captions page and set the captions to OFF.

C707 is just a simple capacitor that is very easy to remove. If you are askign this question it sounds like you are realy winging it which is never a good idea. You may want to instead get a complete repair kit from www.tvrepairkits.com for this model. It will include the parts but more importantly in you case the instructions on how to do the repair from start to finish

Read this fixya tip to adjust the convergnece.

l would check to see on a rear input (audio/video) if this happens and if using a coax connection wiggle the cables with set on and doing this--a poor shield connection on a coax cable will do this also.Trying the rear input will rule things out and may offer a way around the issue.

Don't try that if you are talking about one of the three lens, very easy to open the wrong way and have the Glycol come out all over the place and it is toxic.I know these sets well--just let me first know what the set is doing and not doing!

If its a Sony and a DLP a lot of times just before the lamp life ends it gives a darker or dim picture---if it gets dim enough set will shut down.