20 Most Recent Samsung LE40R74BDX 40 in. LCD Television - Page 5 Questions & Answers

phone samsung known problem with capacitors the will repair for free 03307267864 is the contact number

my tvs saying no signal and ive tryed the source button when i was watching freeview it com up with a system update and nothink happend and now says no signal

Try tv unplug,replug it back about an hour later.The tv now,it resetting back to factory setting.The tv now,should work.Not,than the power supply board is dead.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

It sounds like you have a bad slave inverter board. I've fixed a few of them with the same problem and it's always been this board. With the back off of the tv, it will be the board located all the way to the end where the problem is. It will have several wires going from it to the screen. You will probably have to get the part number off of the board to be able to find one, as I couldn't find one by using that model number.

Most likely failed capacitors in the power supply. I recently had the same problem with my 26 month old Samsung LN46A750. Samsung paid for the installation of an upgraded power supply board.

http://www.thebuzzmedia.com/samsung-tv-capacitor-clicking-issue-and-free-repair/

http://www.avsforum.com/avs-vb/showthread.php?t=1198409

Drill extra holes to match the TV?

IF THETWO BLOWN CAPS WERE IN YOUR POWER SUPPLY REPLSCE THE POWER SUPPLY SOMETIMES EVEN WHEN WE CHANGE THE CAP
THE POWER SUPPLY IS BAD

If the line is there whatever the source of the HD signal and whatever the image then the problem is inside the image processor - a line from the memory bus is fried and not read. The entire board must be replaced and it will cost you around $100.
This is really a job for a pro so take your tv to a repair shop.

Likely only the discharge of static electricity but you can always unplug the TV and (if present) the cable box. Modern sets have to be even sloppier in the assembly to have any dangerous voltages on shields of inputs.

Your tv is not fully VESA compliant. You cannot remove the collar. There are mounts available that grip the screen instead of screwing into the back. This type will look better.

Set a fan to blow into the back vents of the TV.
This will tell you if the issue is heat and it may buy you some time.

You can rig a small CPU blower to cool the TV from Comp USA but you'll need to know how to make a cord.

hi,

your ip board (power board) capactor has already exhusted. got to replace the ip

common problem phone samsung for a free repair i did my tv was 3 years old .but it is a fault with some capasitors they will fix for free

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com

the defective caps in general will be blown upwards there heads will not be flat the value will be indicated on the defective capaciter you must respect polarity .

if sound ok and back light ok the t-con board or the panel itself is faulty.

Your power supply board needs to be REPAIRED not REPLACED, replacing the board will just make the problem happen again in two years or less, if you can use a screwdriver you can send me the board and I will repair it for less than it would cost you to do it yourself ($50) with the correct components. Email for further instructions! Cory Schindler [email protected]