Question about Akai PT4799HD Rear Projection Television

1 Answer

Wavy horizntal lines - Akai PT4799HD Rear Projection Television

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Akai Master
  • 3,459 Answers

Projection TV sets have two very common problems listed below.

Problem #1) 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

wavy horizntal lines - bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya

Posted on May 07, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What are the icons "musical note with wavy lines" and one that looks like a walky-talky?

one wavy line is an eighth note - 1/2 a beat (a quarter note). Two wavy lines is a sixteenth note - 1/4 beat.

Aug 02, 2017 | Radio Communications

1 Answer


Bulb does not do anything but project white light. Wavy lines are a digital board problem. You should have a tech look at it.

May 20, 2015 | Samsung Televison & Video

1 Answer

How do I fix wavy lines on Hauppauge Wintv hvr950q?

Are they wavy lines throughout the picture or are they just wavy on the side? Waving picture is usually caused by poor power supply filtering. Wavy lines throughout the picture are caused by interference. Try moving the device away from the computer with an extension USB cable it may be picking up interference from the surrounding electronic devices. It could also be defective.

Oct 19, 2014 | Hauppauge WinTV-HVR-950Q (1191) TV Input

1 Answer

There is horizntal line black

If this only happens when using the ADF .Clean the **** glass alongside the main glass with windex.Make sure it is clear of any marks especially liquid paper that can sometimes get stuck on it.

Nov 03, 2012 | Canon NP 6035 Copier

1 Answer

Wavy lines on my Haier 32

Move other devices as far as you can from the TV. A motor on the same circuit can cause wavy lines too. Try a different set in the same location to see what happens. If different results, probably a bad filter or capacitor in the TV.

Jan 25, 2018 | Haier Computers & Internet

1 Answer

Picture goes away leaving a horizonal shining line. Sound remains.

hi, if we are talking abuot a line at the middel of the screen, then its a problem at the horizntal
circuit. it could be a bad contact at the leg of a high voltage capcitor, then you shuld solder the contact. sometime the capacitor have to be changed. good luck!

Feb 17, 2011 | Toshiba 36HF71 36" TV

1 Answer

Vertical line accross. no picture but has sound. could it be the CRT? is it time for a new tv?

hello, if we are talking abuot a line at the middel of the screen, then its a problem at the horizntal
circuit. it could be a bad contact at the leg of a high voltage capcitor, then you shuld solder the contact. sometime the capacitor have to be changed. good luck!

Jan 26, 2011 | Toshiba 27AF41 27" TV

1 Answer

Why my Pixma 780 got 1/8 inch horizntal blue lines

cause the ink carriage is having some kind of ink flow problem...

Nov 22, 2010 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

A wavy line with 3 colors

this a convergence problem and the convergence IC's will need replacing along with some testing of resistors and or replacement
to have a technician come out to do this repair will cost about $300 - $350 to get this fixed

Dec 12, 2008 | RCA HD52W59 HDTV Projection Television

Not finding what you are looking for?
Akai PT4799HD Rear Projection Television Logo

Related Topics:

66 people viewed this question

Ask a Question

Usually answered in minutes!

Top Akai Televison & Video Experts

Jaime Hernandez

Level 3 Expert

2336 Answers

The Knight
The Knight

Level 3 Expert

75404 Answers


Level 3 Expert

79851 Answers

Are you an Akai Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides