Akai PT 4298HDX/SMS -- dead?

dr_nukem · Joined: 08 Mar 2007 Posts: 7

No picture, no sound, just a blinking (10 in case you're counting) timer LED. I've done a ton of reading/research...any thoughts if this is convergence related? Any insite/help?

cory · Guest

tov test if convergence problem i think this model has separate pcb mounted on chassis. if so unplug red connector on left hand side of convergence pcb(power connector). now try and turn on set. if works replace 2 convergence ics(stk392-040) and check all 3.9 ohm resistors on this board.

dr_nukem · Joined: 08 Mar 2007 Posts: 7

Brilliant! Thank you SO much!!!

I diconnected the red lead as suggested. Now the set powers up, I get the usual audio tone associated with power on, & and get the standard video input diplayed (S-Video 1, etc).

The timer LED still blinks (7 times I think), but I can now bring up the menu. WAY not converging...need 3d glasses to read it.

Any further testing I can do or do I simple replace the entire board and ICS components?

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

Replace your convergence ic's, check the resistors around them like Cory said, and check for open pico fuses. I don't remember if there on the right hand side side mount power supply.

dr_nukem · Joined: 08 Mar 2007 Posts: 7

The actual part (BP41-00045B) is out of stock so I've ordered a replacement part (BP95-00142e) that I found discussed on another forum (http://www.tv-forums.com/forum/TV_Equipment_C4/Projection_TV_Forum_F24/Samsung_42_Convergence_problem_P4569/) from www.partstore.com. Total cost with shipping $93 & change. That was the cheapest I could find (J & J Parts - 800 627 4368 - had it for $96.53 + shipping).

I've also gotten a hold of the service guide and will try to do some more testing before plugging in the new board once it arrives.

Sacred · Guest

My AKAI PT4298HD has the same problem. It has been sitting for a year in the corner. I am not able to find anyone who will work on it. Mine went out a month after the warranty was up and AKAI support is worthless. Guess I will just have to throw it away. Let me know if you fix yours DR

dr_nukem · Joined: 08 Mar 2007 Posts: 7

GIDDY UP!! :D

The part arrived today (super fast!)...nearly identical to the original with the only exception that I can find being on one of the plugs (2 minor pieces that I simply shaved off with a knife) that prevented it from plugging into the board.

Plugged everything in, turned on the TV, and THERE'S MY PICTURE!!!!! Put it all back together, plugged my surround system in, and ran the Perfect Picture... appears flawless, at least as good as it was before (hard to tell after not watching for a few days).

I was a bit worried when I ran the PF as the progress bar appeared bowed, but this was fixed by the time it got to the white balance (or whatever it's called) at the end.

Thank you very much for your help Cory, while I thought I had diagnosed the problem, your suggestion to unplug the power is what put me to action and verified the fault (somewhere on the board). VERY much appreciated

Total cost, ~8 hours of internet searching, < 1 hour manual labor, & $93 for the part (BP95-00142e). B E A Utiful!!!!!

cory · Guest

to sacred.replace same part number as dr. nukem.easy to replace and cheap.he even gave you part number.

mauibob · Guest

So, i have had this tv 4 years. went up tonight to watch the news and no pic, only sound. Seems like a power supply problem. I live on Maui and am pretty sure no one here can fix this thing. Suggestions? I am a bicycle mechanic with decent electrical skills.

Sacred · Guest