Question about Akai PT4298HD Rear Projection Television

2 Answers

Akai PT4298HD No Power, Blinking timmer light

Checked voltage at convergence board +22 and -22.
Checked low ohm resistors on conv. board, they seemed fine.
Tried to unpluge power connector at convergence board and set still has no power.
Do'nt here the high voltage come on when powered up.
Can see the heaters light up on all 3 crt's.

Maybe power supply problem?
Please tell what to check on this TV.


Posted by on

2 Answers

Re: Akai PT4298HD No Power, Blinking timmer light

Checked HOT for power and i got plenty on the collector over 1000v. The base showed less than 10v if I remember right. There was no high voltage kicking in at all, so I checked part of the fly back for voltage. I downloaded a schematic for a for a samsung 4416 chassis, which is the same as the 4298. Voltage at pin 10 or 11 should be 117v, I had nothing. Traced back from schematic and found r465( 0.47 ohm resistor} was open, but not burnt. Replaced it and everything fired up. This resistor acts like fuse. A 25cent part can kill a 1000 dollar tv. It works now and I am happy

Posted on Jan 22, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 4 Answers
Re: Akai PT4298HD No Power, Blinking timmer light

If you know aything about tvs which it appears you do check to see if you are getting voltage to the horizontal output ckt at the collector of the horizontal output transistor if you are probably you either have a horizontal drive or output problem if you are not check to see if you have either fuses or icps or pico fuses are open generally you will see about a 135 volts to yhe hoizontal output ckt.

Posted on Jan 20, 2008

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

2 Answers

AKAI rear projection TV won't turn on

possiblity convergence needed...
main power board malfunctioning
contact akai service center

Apr 26, 2010 | Akai PT4298HD Rear Projection Television

1 Answer

My akai pt4298hd is out of zoom and

akai is a samsung tv. you have a defective convergence board. suggest local service center. sorry

Nov 14, 2009 | Akai PT4298HD Rear Projection Television

2 Answers



do me a favor, if the set is still together, please remove the back, and find the convergence card... it is on the upper right hand side. Unplug the RED plastic plug ONLY. Now try to turn on the TV. If it turns on, but the picture looks completely out of convergence, then yo uneed to replace the 2 STK392-040 IC's and you will have to test all of the 3.9 ohm resistors on the board. You will usually find 1 or 2 bad. let me know what you find.

May 18, 2009 | Akai PT4298HD Rear Projection Television

1 Answer

Akai/Samsung PT4299HD Convergence Problem

Ck 3 low ohm resistors 2.7 ohms they will be on same board as ICs.

Feb 13, 2009 | Akai PT4298HD Rear Projection Television

2 Answers

Sony KP 51WS510 convergence problem

You should get service manual and new ohm meter to check parts.
If tools are no good, results will not be good in any case.

I do not compromise on tools quality.

D board replacement is so early decision. As I told you, +22 and -22 should be available in D board. If such voltages are not there, how can convergence ICs carry out the job?

Please have service manual on any online manual store and check power supply area, why +22 and -22 are not being supplied.

Pico fuses should be checked out of board or at least one pin should be unsold to test fuse.
In circuit test of fuse is not good idea and can misguide you with wrong results.

Dec 22, 2008 | Sony KP-51WS510 51" Rear Projection...

1 Answer

Akai Convergence

If it is a fuse with no reading replace it ,What is the location number of part?For example F54 or does it have c45 or R66 ect..... You can E-mail me at

Dec 17, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

Convergence alignment problems with akai ph4298hd

After replacing ics did you ck for opened resistors low ohms 1.5ohms etc...You must get print out of How To Enter Service Menu for convergence it will tell you which numbers control which colors to move up and down to complete alinement for convergences. You must have your hand unit the one that came with set It has all the controls you need to be able to enter service menu!I will check to see if i have How to enter service menu.for this set.

Dec 12, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

AKAI PT4298HD - Does not turn on

Mine had the same symptoms. It was the convergence board. I replaced it and all is fine. the part number is BP95-00142E and is available from It's simple to replace...

you can check this before you buy the part. take off the lower back of the tv. Convergence board is on the right in about the middle of the tv - top of the lower part of the back. comes off with one screw. you can unplug the power (mine was a red plug), then plug the TV back in and it should come on. If it does, picture will be bad, (it can't converge the tubes, obviously), but you should see the picture.

good luck

Jan 28, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

Dead projection tv

replace ic's again with original part check low ohm resistors...disable one side of res. to test..john

Sep 12, 2007 | Akai PT4298HD Rear Projection Television

Not finding what you are looking for?
Akai PT4298HD Rear Projection Television Logo

145 people viewed this question

Ask a Question

Usually answered in minutes!

Top Akai Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers


Level 2 Expert

77 Answers

matt martin
matt martin

Level 3 Expert

1187 Answers

Are you an Akai Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides