Question about Samsung HCM422W 42" Rear Projection Television

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Power popped and now has odd bright colors down the middle** HELP

Ver much a rookie to repairs but I love this TV. Has been working fine for years and last night it made a sharp pop and was out. Unplugged and plugged back in and it powered up but only with strange brightly colored shifting and only down the center (vertically) of the set.
Please advise with potential problems and how to would be great as well.

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The colorwheel is out on the tv

Posted on Nov 05, 2008

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the shop should have told you of any problems after they did the repair; I'd ask them why they didn't.

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No picture,good sound


If everything else works - there is sound and high voltage (static on the screen) - but there is no picture (including no on-screen menus), this limits the likely area of problems is the video output circuitry or CRT filament connections. Check to see if the CRT filaments are glowing. If they are not glowing, check for bad soldering on the CRT neck board and around the flyback transformer. Where the picture is erratic - coming and going entirely or changing brightness suddenly, with power off, remove the picture tube socket (carefully!) and clean the pins with fine sandpaper and use contact cleaner on the socket. This source of bad connections can result in a variety of erratic symptoms. Check for bad solder connections on the CRT neck board

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Whites are real bright and has an orange color


Hi my name is Eric,
I can help you with your issue ,
 This philips TV could have a number off issues, fluid leaking from a CRT,
or the SSB or SSM boards are bad.
I tech will charge you over $350 to replace a board.
There are color adjusters in the back inside the TV , red blue green screen controls, it wouldn't solve your issue , but lowering on may make it watchable for now
 
 
If I have helped you with your issue please click accept.
If you have more questions you can still respond
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I have blue arched lines on my sony kp 57wv600 is there a fix for this


Those are retrace lines, the screen controls which are a technical control located under the front gray panel of your tv needs adjusted. This also could be an indication of a bigger problem, most common would be the focus block failing. it could also be of the picture tubes failing but this is not as common or possibly the crt driver ic's. There are specific diagnositc steps to preform to isolate the potental failure. this could lead to the tv going very bright then shutting down.
The first thing a tech is going to do is to adjust the screens and leave, somtimes this is enough, but sometimes it is not. if you want to try and adjust the screen i have an instruction set below, but i must warn you that there are high voltages present when attempting this adjustment and can be dangerous if you are un familure with tv repair.


Turn your color all the way down and the brightness in the middle, then find the focus block, it will be a block with 6 controls one row will say screen the other will say focus near the picture tubes, adjust the screen controls(one control for each color) until the picture has a good black and white look to it, then turn your color up and it should look fine. This is how i balance out the picture. But there is another method that allot of techs use, the other method is to adjust the brightness up until you see what is called retrace lines it is a jagged line going down the screen, once you see these lines back the adjustment down just until they disappear. Do this for all three colors. This method works but on an older set can throw the white balance off because of tube wear.

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on this type of tv each gun is controled by hor.and ver. chip together. it is on the board that controls the convergence of the tv. some manufactors have recalls on problems like this. i dont know if this one does but it may. you can check with mitsub. i do know that this part is about 250.00

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Dark picture


you know it sounds like the same problem i had....
look this is something you can try.... "turn the tv off and unplugg it!!!"...you'll need to take out the lower front part of the tv......(where the speakers are to be exact) on each lower end you will find 2 screws..Be careful it will open to the side and there are many wires, i suggest you mark them to know where to put them back...then right in the middle there will be a black cover with about 5 screws..take them out....and look at the very bottom you'll see a thing with 6 pegs....the top ones are for the screen "DO NOT TOUCH THEM"...the ones on the bottom are for the colors...re adjust them...the left one it's for blue, the middle one it's for green and the last one it's for red...

I had the same problem after i moved....and after i re adjust that the tv looks super...
i hope that helps..:P

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Blue waves


You need convergence circuit repair. The cost depends on where you live and who you call.

In Calgary, Canada typical TV shops want $300 to $650 for convergence repair. They will include cabinet damage and wall scratches for free.

It is a difficult technical repair to attempt as a rookie tech. It is even more difficult if alignment is required or any secondary problems are encountered. If you have no tools, no experience soldering or doing electronic repair; you may end up with scrap or paying a high price for someone to fix after your attempt to repair.

easyab

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Samsung rear projection television HCN4226WX/XAA


Dead Samsung

I don't recommend working on the TV unless you have some experience and knowledge relating to the safety issues and electronic repair. Most rookies will not successfully complete the repair and probably do more harm than good.

Sometimes when the convergence chips fail, the TV senses the changed load condition and shuts down.

Unplugging the blue, red or green convergence connector on the convergence board removes the overload condition if the IC is shorted and allows the tv to run, with one color missing.

This is done with the tv unplugged. Then plugged in and turned on to see if it starts. Turn off immediately if you here it start.

Now you know if convergence failure caused the shutdown. You can repair the convergence circuit if that is the problem.

If this has no affect, then you could have a number of different faults in Vertical output, Power Supply or HV circuits that require the expertise of a qualified service person. This would be a bench repair in most shops.

If you live around Calgary, Alberta try me instead:

http://calgaryconvergencerepair.weebly.com/convergence-explanation.html

Or try to the find the repairperson part of this website (on the Homepage) and search postal code. Maybe you will be lucky and someone from your area is listed for Projection TV repair.

Most rookies doing this job will cause damage and not be successful. They will pay double for someone to fix their mess or end up scrapping the TV. It is not a simple task. It is more difficult than batteries on a remote.

Good Luck

easyab

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It sounds like either one of the tubes are arcing (internally)....Or maybe one of the high voltage leads are arcing to the crt metal housing.......If so you'll see burn marks on the metal.....apply some silcone to the wire where it attaches to the tube.

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