20 Most Recent Samsung HP-T4254 42 in. Plasma Television - Page 8 Questions & Answers

I had the same problem....long story, but with some help I found it needed a power supply. Bought one on E-bay used for 55.00 feel free to contact me
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With the tv off. On your tv remote Press "MUTE" 182 then Power quickly. This will bring the set up into the service menu. In each of the selections look for Factory Reset. AND only that selection. Select the reset and the tv will shut off. Turn on the set and you should be able to to select your channels. If you have NOT set your own code then try "0000"

To change this, you need to access the Digital Menu, Setup, Parental Lock and turn the lock for PG off. Or enter the 0000 code.

Try leaving the TV unpugged for 30 minutes so the TV can reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

message dont look here ask on ebay they might help i wont

It is the power board ....check any swollen capacitors on that board...if any replace it...it is cheaper to repair...either u can do or in repiar shop...

Check and replace swollen capacitors in power board.

there is no upgrade to fix this problem, you need to adjust the VS-voltages and the V-scan voltages

with the power off... press 8-2-4 power on. this will reset the parental lock pine to 0-0-0-0.

sparkling red pixels. or misfiring pixels.
There is a chance to adjust the screen. has to be done for an authorized service center. Call them and find the closest to your area.

http://www.retrevo.com/support/Samsung-HP-T4254-TVs-manual/id/2727dj896/t/2/

try this or simply pick your remote and press the menu key and then go in sound option and then reset the equalizer

I know you don't wanto hear this but, PRO shop. As who knows what burned. I foyu rnot famailar with this stuff you'll waste time and money, Pro Shop or get another LCD with 120HZ

Okay,i assumed this is what you have:
HD cable box with HDMI cable connection to the Samsung TV.
Listen careful as follow:
First you want to make sure using the same HD comcast box with HDMI connection for our Samsung TV as well as your other TV.Be sure the other TV do received the missing channels from the Samsung TV.You must be SURE you have tested both TVs with the same HDMI cable with the SAME HD cable box.
Now that you have confirmed the both TVS are using the same HD comcast box and the same HDMI cable but the connection that goes to the Samsung TV are missing some channels,at this point,use another HDMI connection behind your Samsung TV and see if you have the same problem.If so,please also try the left side of the HDMI connection and see if you could get the other channels.
Let me know!
solutiondoct

there is a firmware update on samsung.com to solve that problem I believe

I will unplug the TV power cord from the surge protector and have it connect directly to the outlet first and see if this will resolve the issue,small chance but worth to try.
Secondly,if you have an universal remote control for your system,you need to let me know what kind!
Now,if you don't have an universal remote control that had programmed to either IR or RF,and you have the TV power cord connected directly to the outlet and still having the same issue,it is time for a TV repair specialist to check it out;however,if you have your TV more than 7-10 years,you might consider buying a new one,cause cost of labor and part might not be worth to fix it.
Soultiondoct

The driver boards on that side of the set need to be replaced, about $400 for parts.

Try a hard reset first:
Unplug TV from power source and undo all cabling. Wait about 5 minutes and replug and redo cabling.

Please try this first and let me know how it goes..

chek powersuply