Re: Sony KDL-50W828B sound but no picture
I am sorry for the late reply.
After some more inspection and testing, even the good side of the screen went bad.
So after that I did not bother to do more testing and I trashed it.
Thanks for your help.
Joop
Member
Last Activity: 06-09-2020, 01:27 PM
Joined: 01-28-2017
Location: Vlaardingen
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Re: Sony KDL-50W828B sound but no picture
Hi,
Water damage is possible but I did not find any trace of water. Both driver board are very clean and also on the bezel no water stains.
What happened with trace I don't know. Cleaning it is not possible I think because it is behind the glass.
I will have to remove more parts from the bezel to have a closer inspection. It could take awhile because of my limited time.
I will keep you informed.Leave a comment:
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Re: Sony KDL-50W828B sound but no picture
Here's a picture....Leave a comment:
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Re: Sony KDL-50W828B sound but no picture
Hi,
I did have a closer look at the lcd and i found a crusty looking trace on the lcd.
It is at the far right bottom corner of the screen. Could that be the short?
Would it be possible to fix this with the cutoff tape methode?
I don't really understand the theory behind this methode. Is it to bypass the bad signals-shorts?Leave a comment:
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Re: Sony KDL-50W828B sound but no picture
Thanks for your answer.
So this one goes to the landfill. I won't be buying Sony tv's anymore.Leave a comment:
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Sony KDL-50W828B sound but no picture
Hello,
I have a Sony KDL-50W828B TV with sound but no picture.
What I eventually did is I disconnected 1 of the lvds ribbon cables between the Tcon and the “buffer boards”. I mean the boards that are connected to the lcd panel itself.
When I disconnect the left ribbon cable nothing happens. Only the backlight stays on.
When I disconnect the right cable, the left of the screen comes on and I have a picture.
I tested all the components on the right buffer board for shorts but I did not find any.
When I measured the voltages on the Tcon... -
Re: New Members - please post your introductions here
Hi,
My name is Joop and I live in the netherlands.
I like to repair broken stuff. Not only electronics but also cars etc.
By profession I am a Senior Maintenance Technician Rotating equipment at a oil refinery.
I did several courses in electronics not for work but just because I am interested in electronics.
I hope to learn more about electronics on this great forum especially on component level repairs.
ByeLeave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
IC3107 ATMLH 842 2EB 1 this is a 256K eeprom
I tried all the combinations of resseting the eeprom but it didn't work for me....Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Hi,
I tried IC7004 and IC3107 but nothing worked for me.
Thats wy I installed a new mainboard. Maybe there is a other problem with my board....Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Hi,
Because the set works with a new Mainboard, I dont think it has anything tot do with the switches.Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Hi,
Because the set works with a new Mainboard, I dont think it has anything tot do with the switches.Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
The eeprom I tried was IC3107 ATMLH 842 2EB 1 256K.
Didn't find IC5004 on my board.
I did find other eeproms with low mem.
IC3101 2K
IC3102 2K
IC3103 2K
IC3104 2K
IC3106 2K
IC3112 2K
IC7004 S 24C S0??...Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Hi,
I understand the procedure but I still don't know in what state the set must be in?
Because the main board remembers the last state it was in, it goes to that state when plugging in the power cord.
So when it was in standby, I unplug it, short the eeprom and plug it in. The set goes to the standby state.
When it was in the “on” state, , I unplug it, short the eeprom and plug it in. The set goes to the "on" state. (fan starts direct"
So there can be 2 states.
Please...Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Hi,
What I meant is, there are 2 states when plugging in the power cord.
1: When you unplug the powercord and the tv was in a standby state, the next time you plug in the cord the set goes into standby.
2: When you unplug the powercord and the tv was in a “on” state, the next time you plug in the power cord the set goes into a “on” state.
I tried both states with the short but it didn’t help.
When there is a corrupt eeprom, is it stil possible to have these 2 states?...Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Hi,
I have shorted the pins 5 (SDA) and 6 (SCL). done this with power on and stb but no luck.
Today I received the main board, installed it and its up and running.
After all it was the main board.
So everyone with similar behavior of the mainboard as described, try a Eeprom reset or change the main board.
I am very glad.
Of course in the mean wile I bought a 55inch led lcd so the 40inch Samsung goes to the bedroom.
The total cost of the parts are 58 Euro for the...Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
I found another eeprom with 256K mem. It was the only one with 256K mem according to the data sheet ATMLH 830 2EB. Shorting the pins didn't help. On another forum someone said to desolder the eeprom and see if the tv works? Is that possible?
Getting the replacement board Saturday.
Hope it isn't the Tcon that is causing the fault.
Will keep you guy's informed.Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
It was the only chip I found with 8 legs and 24C.
Today I bought a mainboard. I will let you know if it works.Last edited by Joop; 02-08-2017, 03:39 PM.Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Hi,
I found the Eeprom its a S 24C SO.
Try to do a reset as you described but no luck.
The standby led stil blinks 5 times and then nothing.
I measured the the two caps.
Top cap on the picture: left 0 v on the right side 3.33 v
Bottom cap on the picture: left 1.29v on the right side 0v
What does that mean?
I also measured the voltage on the eeprom between Vss and Vcc its 3.30 vLeave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Hi,
I tested the linear voltage regulators on the mainboard. Are there also switching ones?
Are there other checks I could do before I order a new mainboard?
Do you have any advice on how to order a mainboard. (numbers etc.)
On another forum someone advised me to de-solder the Eeprom and then test the tv because It could be corrupted. I will try that this week.Leave a comment:
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Re: No picture and sound Samsung LCD LE40A656A1FXXU
Here's a photo of my mainboard.
Any suggestions?...Leave a comment:
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