Question about JVC AV-48WP30 48" Rear Projection Television

1 Answer

No picture, no sound power indicator light is on

I have a JVC AV-48WP30. I replaced convergence board chips several years ago due to convergence problems and was fixed. Now when I turn it on no sound, no picture but the power indicator light is on. Is it the convergence board issue again?

Posted by robtn320 on

  • robtn320 Sep 21, 2009

    Not sure if it's power supply. I pulled out the whole convergence board and turned it on and I get static picture and sound. Static because I don't have a signal source hooked up. Would a convergence board repair kit(resistors and STK's) fix this?



1 Answer

Nate Stansfield

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Power supply needs to be replaced this time.

Posted on Aug 05, 2009

  • Nate Stansfield
    Nate Stansfield Sep 22, 2009

    That would most certainly fix your problem

  • Nate Stansfield
    Nate Stansfield Sep 27, 2009

    If you are getting sound but no picture, then the IC's or STK's need to be replaced. If you get a blue or fuzzy picture, then the tuner may be bad. If you are not getting any power or too much power, then the power supply is faulty.



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Jvc av-48wp30 blue to align convergence

Tv colors R,G,B don't alignment any colors.Tv have a convergence problems,it dead.Tv convergence board require changes 2 STK convergence ICS and some or all it resitors to solved convergence problems.The shop will cost u $300-350 for parts and labors.

Jul 11, 2010 | JVC AV-48WP30 48" Rear Projection...

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JVC AV-48WP30 Convergence Problem

If you know how to solder, I would suggest to just replace the STK ICs and some of the low value resistors. If you do not how to solder replacing the entire board is the way to to get the TV fix. You might still need to adjust the convergence after the board replacement.
Let me know if you need further assistance.

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JVC AV-48WP30 problem starting up

The old video card has seen better days, methinks. All those symptoms lead one to conclude it needs a 'substitute' to enter the field, or call a long TV time out(too much pro and super bowl isms, eh?)..

Are you planning on doing this yourself?

Feb 11, 2008 | JVC AV-48WP30 48" Rear Projection...

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JVC AV-48WP30 , how to change convergence

First of all tools,requirement to do the work on the Convergence board to do changes the 2 STK convergence ICS and some or all it resistors.U have a soldering iron,desoldering pump or soldering wicks and solders?Don't?must buy to do desoldering and soldering?Tries to buy solders.Tries wesites like to buy the convergence kit to replaced ur self,and buy the soldering iron here it have the desoldering pump attach to the sodering iron it self.For video tutoring how to take out convergence board out of the tv and replacing the 2 STK covergence ICS and some or all it resistors.Might included in the buying of the convergence kit,not,Try You Tube type in convergence problems,will have video some body doing it.

Jun 07, 2010 | JVC AV-48WP30 48" Rear Projection...

1 Answer

HI, my JVC AV-48wp30 has the same symptoms as other posts here. Powers on with no screen, HV, and no CRT heater coils light up. Thumping sound in speakers, and then shuts off. Blue light flashes. ...

take off the front panel and unplug the convergance board up front just behinf panel if the set now comes on replace your con amps if not you have a power supply issue more than likly the con amps are bad

Nov 20, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

I had a convergence problem on my JVC AV-48WP30, and followed the instructions posted by SD Tech. I used STK-392-150 chips and I replaced 1 burned out resistor that had no bands, but was marked 1.8 ohm J...

Yes, it does not happen often but you may have installed or got a new chip that is bad--you did apply heat sink compound to the new chips?

Check all the resistors carefully when you do this and double check all the soldering you do.

Let me know if you need help.

Rate this solution as I DO THIS HERE FOR FREE.


Nov 09, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Jvc av-48wp74 i have sound but no picture History I have a JVC AV-48wp74 Projection tv when i got this tv the stk ic's were overheating and the picture would come and go typical of overheating . I put a...

Number 1- don't spin your wheels on the replacement board repair the old, it can't be unrepairable. As for the over heating of the conv ic's not normal. Since you changed the conv bd and they still over heat, if I had the set I would do a reset of the registers in the service convergence mode then re-center the grn then red then blue and that will be with the centering magnets and yoke on the crt's, If you don't have a template for that then you will have to make good old fashion geometry measurement's, the green is first, every line straight vert, horz, and spaced, with of coarse the cross in the middle will be dead ctr. The overheating problem can be because the register settings are advanced to far do to corrections thru out the years with comp's changing in value and us compensating with adjusting the convergence.

Feb 27, 2009 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Convergence problem wiht jvc av 48wp30

Bad chips...There are a ton of cheap fakes out there....Or bad resistor...

Projection TV sets have several common problems listed below.

Problem #1) Convergence


  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
Problem #2 CRT Fluid has clouded over.


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:

You can see more examples and find a fix here...


Sep 29, 2008 | JVC AV-48WP30 48" Rear Projection...

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