Question about Sony Grand WEGA KDF-50WE655 50" Rear Projection HDTV

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Sony WEGA has multicolered vertical lines

When I turn the TV on it warms up slowly (2-3 minutes) then the entire screen is covered with thin multicolored vertical lines. Occasionaly it will actually come on like it's supposed to though.

I've heard that it could be the Q-Box. Is this true? If so what is the Q-Box, how much does it cost, and a fairly technically savy person replace it?

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  • 5 more comments 
  • eeeerock Oct 21, 2008

    Thanks MisterSony. If the computer does successfully come on, I think the OSD/Menu works. I'll have to try it. However, when the vertical lines are showing, nothing works at all.

  • eeeerock Oct 21, 2008

    Thanks MisterSony. If the computer does successfully come on, I think the OSD/Menu works. I'll have to try it. However, when the vertical lines are showing, nothing works at all.

  • eeeerock Oct 22, 2008

    Thanks mistersony. I tried to get the "normal" screen to come up last night, but didn't have any luck. I still get the vertical lines, and of course the OSD doesn't even show up. I'm willing to tear into this thing in an attempt to fix it. I won't be out much being it was given to me from my brother-in-law (and yes he did indicate it was broken).

    So if you don't recommend that I go into service mode on the unit, what do you think my best course of action is?

  • eeeerock Oct 22, 2008

    Thanks MisterSony. I'll give it a shot this evening and get back to you. FYI, I'm in the process of acquiring a service manual. Hopefully it will help as well.

  • eeeerock Oct 28, 2008


    Sorry it took me so long to get this info back to you. I've been traveling since late last week. When I went into service mode. I got the following info displayed on the screen during two different trials:


    0 NV_CC 204 Diff 1


    0 DCP - INT

    0 DENC 1

    NVM = OK NVM - VER = 0006

    Any ideas as to what it all means?

  • Any Guy
    Any Guy May 11, 2010

    So what you are saying is that sometimes it comes up and the menu/osd works, but sometimes you get nothing but the colored lines. I would almost have to put the set in service mode when it had the colored lines to be sure it was not a block problem. It could be the Q-box, since the OSD graphics are generated in the B board and then fed to the Qbox where is eventually gets to the display. By putting it in service mode you could display the panel test patterns and at least verify that the block was OK. You could also use the Qbox patterns and see if they work. Before you ask, No I don't recommend you get into the service mode. The reason being, you need to know the service menu pretty well to navigate the service mode when you can't see anything but colored lines on the display. It's much easier when the Test Mode graphics can be read and I would be willing to walk you through it, but with only colored lines, it's a bit too complicated and very easy to mess up something. Sorry!

  • Any Guy
    Any Guy May 11, 2010

    Does the OSD (on screen display work? Or the menu?



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OK, much as I have reservations, let's try service mode. To enter service mode, you MUST have the original Sony remote. You need to press these buttons in order, with the TV off. You have about 2 or 3 seconds to complete the series of buttons. Press:
#5 (the 5 on the number keypad)
Vol + (volume up)
Then, after the screen is lit, press the "jump" carefully 3 times. If the word "penle appears in the upper left corner, the optical block is OK and it's probably a Q-box problem. It COULD also be the LVDS cable that sends the signal to the optical block. If you press anything else, IMMEDIATELY TURN THE TV OFF AND START AGAIN. The TV should reset to the original values.

Posted on Oct 22, 2008

  • Any Guy
    Any Guy Oct 22, 2008

    Be sure to rate the help I have given you

  • Any Guy
    Any Guy Oct 28, 2008

    If you got that information to display when you were getting the multicolored lines problem then you have successfully eliminated the optical block as the source of your problem. It's now probably safe to assume that the Q box is the source of your problem. Be prepared: the q-box is usually a very expensive part, though not as bad as the optical block.



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