Samsung LE37A556P1F Flashing red light

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

Uhm... in post #8 you said it was a BN41-00974B "EMMA" board, which is what I searched for !?

edit: wait a second... the mainboard picture in post #9 says it's a BN41-00813E "BORDEAUX PLUS" (codename) in the top left corner (above the CI card slot.. where the white arrow points to).

Searched for that and found a few boards. Apparently, this board or a slight variation of it was used in the LExxM86BD and M87BD series TVs. Those had problems with a corrupted user-settings EEPROM (just like the R88 series) on the board, preventing them from being turned on.

I've attached a marked pic of the backside of your mainboard. Could you list what it says on the marked 8pin chips?

One of them should be a 256KBit EEPROM, usually from Atmel.
It should say ATML in the first line, and either "(AT)24C256B" or "2EB1" in the 2nd line.

Resetting that (or replacing it) could bring it back to life. I remember that when I played with the service menu settings on my Samsung too much, it wouldn't turn on anymore (LED blinks a few times, then goes steady (standby mode))
Had to reset the EEPROM to get it to boot properly again.

Tell me if you found it.. the reset procedure is a bit tricky, but unlike buying a blank replacement, it's free

edit: the BN41-00813E board is quite a bit more expensive *click*

The bottom of that board looks different to the one I have. It does still have 6 8pin chips on it though and here are the numbers.

2544 1ym 0815

ATMLH820 0281 Z8F5509D (x3)

ATMLH816 2EB 715070

MP23630N p2831989 MP5815

They are how they read on mine.

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

I wasn't aware this was also a problem on the 5 series and from what I read it isn't. Here's hoping this turns out to be a case of 'don't believe everything you read on the internet'. Any 5 series I have replaced caps on I have never had to replace the eeprom on the mainboard. I have only had to do it with the older R series, although I know it does happen on the M series and S series LCD's and Q series plasmas.

If your handy with a soldering iron I wouldn't waste your time trying to reset it, your better off just replacing it, save yourself the grief of possibly ending up with some functions still corrupted and or picture problems on some inputs.

The Atmel AT24C256B is no longer manufactured so getting your hands on one for a sensible price will be difficult. There are sellers here in the U.K selling them on Fleabay but they are asking £2 with £1.50 P+P!!

I have found a comparable epprom for replacing the AT24C256B but I am not sure if it will be alright. Can anyone with more knowledge tell me if it would be a good replacement. It's a Microchip 24LC256-I/P. The only difference I can see is the clock rate is 2Mhz instead of 1Mhz. Should be good but it's always best to ask before going and buying a pile of them!

Remember to let us all know how you get on Jasgriff. I too am keen to find out if this does occur with the 5 series Sammys.

Edit: Forgot to say HAPPY BIRTHDAY!!

Tried it a few times and it still doesnt seem to bring up a picture oe play any sounds.

The remote still seems to work the tv as the standby light seems to be doing all of the right things just nothing else really seems to be happening with it.

I am going to try again a few more times to see if I can get it going.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

If the numbers aren't the same I wouldn't short those out! I am pretty sure the back up of your eeprom is stored on a similar chip and if you blank that your going to need to replace the mainboard or pick up a faulty board that you can retrieve the back up from.

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

If the numbers aren't the same I wouldn't short those out! I am pretty sure the back up of your eeprom is stored on a similar chip and if you blank that your going to need to replace the mainboard or pick up a faulty board that you can retrieve the back up from.

Think i'm already at the finding another mainboard stage to be honest.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

Don't lose hope yet, I am googling away here, lol.

Can you tell me which of the chips you tried to short? All the ones beginning with ATM are eeproms.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

Going by a close up of your pictures your main board is a BN41-00813E-LP1.0 (it's written in white in the top left corner on the top side of the mainboard) Can you confirm this.

This is the same main board as is used in the LE40M87BDX (you also have the same power supply as the LE40M87BDX going by your pics)

The main board you would expect to see in the LE37A556P1F is the BN41-0094A. If you do end up going down the route of having to change the main board this is a possible replacement as well as the BN41-00813E.

For your board (BN41-00813E) It looks like the eeprom chip you want to be trying to reset or replace is located at IC1803. Find this and tell me what the serial number is.

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

Going by a close up of your pictures your main board is a BN41-00813E-LP1.0 (it's written in white in the top left corner on the top side of the mainboard) Can you confirm this.

This is the same main board as is used in the LE40M87BDX (you also have the same power supply as the LE40M87BDX going by your pics)

The main board you would expect to see in the LE37A556P1F is the BN41-0094A. If you do end up going down the route of having to change the main board this is a possible replacement as well as the BN41-00813E.

For your board (BN41-00813E) It looks like the eeprom chip you want to be trying to reset or replace is located at IC1803. Find this and tell me what the serial number is.

Hi,

BN44-00974B is the mainboard.

IC3106 = ATMLH820 0281 28F5509D is the one that I have as being the one that needs shorting.

This is the one closest to the 100ohm Resistors

There are 3 of those same Atmels on the underside of the mainboard.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

Now I know why I am getting confused. It's Techamps pictures in post 9 I have been looking at ARRGGGGHHHHH!!

Could someone please remove Techamps posts? If he is still interested in getting help then he can make his own thread!

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

Forgot EVERYTHING I just said Jasgriff. Although the info is still interesting in it's own right, lol. It is of no help to you!

making a coffee, I will return...

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

Forgot EVERYTHING I just said Jasgriff. Although the info is still interesting in it's own right, lol. It is of no help to you!

making a coffee, I will return...

Lol will do....

On a + note I have fixed a Technika 19" that I picked up for 99p in the mean time so its not all bad!

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

Can you post a picture of the topside and bottom side of your main board please Jasgriff and a close up of the eeproms/Atmel chips locations.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

Lol will do....

On a + note I have fixed a Technika 19" that I picked up for 99p in the mean time so its not all bad!

Good stuff! Was it just bad caps on the power supply?

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

Good stuff! Was it just bad caps on the power supply?

Yeah 2 bad caps on the power supply. Looks like i forgot to plug the DVD drive back in when I put it back together though

How can I get the spec sheet on a j.d 25v1000uf CD286? I want to make sure I am using the right replacements.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

you don't need a spec sheet for the caps. So long as you are using good quality low ESR caps and the values are the same (voltage can be higher but I wouldn't get crazy! always use the same uF value) you will be good. If they are both 25v 1000uF then personally I would replace them with 35v 1000uF low ESR branded caps, Panasonic, Rubycon, Nichicon etc.

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

I thought that but I have started to notice more and more people asking for the spec of the caps to match up good replacements. I have another one of these Technika ones so I will be sure to make a new thread with a few pics incase anyone else comes across the same issue.

I don't have my proper camera to hand so I am charging up a playbook to see if I can get a couple of pictures of my mainboard using that.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

Just in case Scenic reads through this, you have also been confused by the looks of it by post 8 which is Jasgriff and post 9 which is Techamp.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

I can see this thread getting even more off topic than just Techamps confusing posts! hahahaha!! I have had my eyes on those playbooks for a while now considering the price, what your getting for your money and the ability to use android apps. My main use would be light surfing and in particular reading PDF. documents, would you recommend them?

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

Yeah they are well made and are good for multitasking etc. They come with docstogo for reading and writing excel word powerpoint etc. The Andriod app app hasn't come on yet thats supposed to be this month some time which will make it better again.

The real benefit is linking it to nearly every phone ( Except and Iphone ) to connect it to the internet on the move or if you have a Blackberry then its great for connecting to your phone.

Not good for close up pictures though by the looks of it! lol

[Jasgriff]

Re: Samsung LE37A556P1F Flashing red light

Here is a pic of the board with labels on where the IC's are.

[py3m4n]

Re: Samsung LE37A556P1F Flashing red light

The difficulty I am having is sussing out which one of those eeproms is the one that's used to store the software we want to try and reset and what the others are used for (given that one will likely be a back up).

We can rule out the MP23630N as it's not an epprom and I am pretty sure we can rule out the ATMLH816 (also know as AT24C32CN) as it only has 32K of memory, not enough to store the operating system, it requires a minimum of 256K. The remaining 3 ATMLH820 (also known as AT24C02) are essentially the same as the previously mentioned AT24C256B (the one Techamp want's to be replacing, lol) except they are surface mount rather than through hole IC's.

Soooooo that tells me one of the 3 ATMLH820 will store the operating system, another will store the back up (or possibly both, I just don't know)

Here is my dilemma, lol. I presume you chose IC3106 because it was beside the 100 ohm resistor but that was from Scenics reply to what we now know is Techamps pics (the BN41-00813E mainboard) So I personally wouldn't apply that to your board, given it's a different design.

Now, lol. Like I mentioned originally I cant find any cases were even resetting or replacing the eeprom on the LE37A556 (BN41-0094A) has been done. although it has been done on the LE40A557 (mainboard BN44-00199A) and it is located at IC5107.

My gut instinct is that the eeprom is the problem and replacing it is a lot cheaper the paying out for a replacement main board (A lot!). The problem is, I'm stumped at this point. I even have the service manual and it states, from what I can tell, that it uses a AT24C256B (the one Techamp needs?!?!) and it is definitely the parts list for the LE37A556P1F (BN41-0094A).

My brain is frazzled (I need another coffee!) and we need someone with more knowledge about your main board. My problem now is I won't be happy till I find out which one it is!