Part number for the samsung le52m87bd backlight inverter
I have a problem with the LE52m87 which I am told byy one of your experts is the backlight inverter (buzzing noise, no picture, but sound; shine a torch and can just see an image).
I have been given part number BN94-00963B which appears to be the control board. Do i replace this whole board (around $250) or is the backlight inverter separate/a part of this board? If so what part number is the backlight inverter? Generally they seem to be about $30 but i cant find the one for my set
Re: part number for the samsung le52m87bd backlight...
I also have a SAMSUNG LE52M87 LCD TV and I have the same ANOYING BUZZ comming from ( I think ) backlight converter. - I am almost 100% that its because of the backlight inverter while the sound shifts frequency when backlight is changed ( from 1 - 10 ), but the volume of the buzz stays the same. Only the tone changes. I have this TV for a year now and havent realy noticed until now, so I think it started buzzing recently, because I didnt hear it before ( and I got realy sensitive hearing :) ) ...
ITS DRIVING ME CRAZY ...
PLEASE post what happened when ( if ) you changed the inverter, or what did you do to solve the problem ...
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The inverter board is responsible for the backlight so you can see the picture. If the picture just goes off intermittently then that means that the backlight is being turned off. And since the inverter board powers the backlighting you might want to look there.
Your tv has problem with the back light inverter. As you didn't specified the model number its not possible to know is it back light or CCFL one. How ever i have added video to know hoe to find the inverter check it.
Hello Your Samsung tV is LCD type. It has no bulb to replace as in DLP projection televisions. there is CCFL [Cold Cathode Flourocent Lamps] are the lighting devices, which are fitted just behind the LCD screen There will be more than 12 numbers of them, accroding to screen size. If these lamps do not light up; that is; if you do not get any backlight with your LCD TV, the backlight inverter board should be troubleshooted. This is the board that supplies high frequency high voltage to these lamps to light up. Check this inverter baord first. Repalcing backlight CCFL lamps is really a skilled work, as they are fitted inside the panel, and to replace them, you have to disassable the panel itself.
Kung LCD TV ang unit mo, 3 ang dahilan kung kaya la kang picture.
1. Me pundido kang backlight - kapag me pundido kang backlight kusang pinapatay ng power supply ang inverter board para hindi ma-overload kaya la kang picture. Maaring mong i-check ang backlight, ang palatandaan na ito ay pundido ay kapag me itim sa magkabilang dulo.
2. Sira ang inverter board - ang inverter board ang nagbibigay ng high voltage sa backlight. Kapag sira ito, natural d gagana ang backlight. karamihang sira ng backlight ay ang high voltage transformer, driver transistor o kaya me open na fuse/fusible resistor.
3. Power supply- kapag la supply voltage sa inverter board, la ka rin picture. Mas maganda kung ito ang sira dahil mas madali makhanap ng pyesa dyan sa lugar mo di katulad ng 2 nauna.
Kung me kakilala kang technician dyan malapit sa lugar nyo, patingnan mo yong mga sinabi ko. Maari ring dahil sa loose connection kaya la ka picture o kaya bad solder joints.
Salamat kapatid sa pagboto 4 na hinlalaki.
Las Pinas NCR.
Yes,Ur LCD inverter backlight board is dead.Replaced this LCD inverter backlight board,will get ur picture back.Tries these Websites Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter backlight board for the replacement.The board is long in shape.
You more likely to need to backlight inverter boards, thpower supply should have 24vdc for the backlight inverter board, the 24vdc power supply get the trun on command from the controller board, that is what should have been checked first. So look for 24v or measure it directly on the inverter board connector pin. The invereter board also has a couple surface mounted fusesYou can get the inverter board here but make sure to match the number: http://www.shopjimmy.com/catalogsearch/result/index/?q=LN-T4665F+&limit=100
This is a common problem; either the inverter or the back light has malfunctioned. The inverter takes AC turns it into high voltage DC and then uses that to power a fluorescent light element (backlight).
The fact that you can see a faint picture proves that the inverter or backlight has malfunctioned.
You will need:
A service manual (to find the voltage levels and signal levels to compare with the measured values)
A multimeter (to measure the voltage levels at the prescribed test points)
Now, after finding the inverter board, use the service manual to guide you in testing the prescribed test points and determining if the problem is the inverter or the backlight. If the problem is the inverter, use the service manual instructions on how to remove the board properly.
If the backlight is bad, use the service manual to guide you as to how to remove the screen in-order to get to the backlight.
I hope this helps,