Samsung LN40B650 Standby light on, won't turn on

[tom66]

Re: Samsung LN40B650 Standby light on, won't turn on

EEPROMs are typically 24Cxxxx where xxxx is any number such as 02, 16, 256, 1025, ...
http://wiki.samygo.tv/index.php5/UnB...EPROM_Location

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

hmmm, I looked back over the pictures I posted of the board, I don't see anything labeled that clearly to say "hey, test here!" Oh well. Sit here twiddling my thumbs waiting for the new board to arrive.

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

Hi Tom!

I was actually looking over that site last night. According to all the documentation I could find, and even according to Samsung, on this board it's supposed to be a 24C02. 24C02 is typically an 8-pin IC, I checked every 8-pin I could fine on that board, and none of them was labeled 24C02.

[tom66]

Re: Samsung LN40B650 Standby light on, won't turn on

They are interchangeable, did you see any 8 pin IC marked "24" and some other characters?

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

negative. I did just notice on that samygo page, one of the LE*B series shows the IC as being an ATMLH942, and I think I did see one of those, I'll check again tonight.

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

SO )*&#$(*#&$#Q@&$ PO'd right now. Word of advice - avoid eBay seller "parts4pros". Agreed to the price on the mainboard, then waited until today, when the other one at a similar price was gone, and refunded my money, claiming the part was a relisting after someone else had bought and returned it and now they can't find it in the warehouse. Says he'll let me know if they find it. Wait till he sees his feedback. UGH!.

Still gotta find that eeprom, but kids need to eat dinner, and I have the SPMS for my Samsung DLP to recap first!

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

Good news, I found another board, it's going to cost me the same for the board, but an extra $10 for shipping, so that's been ordered and is on its way. In the meantime, going to try to find that EEPROM.

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

ok, I think I may have figured it out... of the 8-pin ICs on the board, several of them are all ATMEL chips. I found (2) ATMLH852s, (1) ATMLH848, and (1) ATMLH842. When I search for any of them, I keep getting redirected to the same few sites that have no information. When I search for the ATMLH842, along with the package code (2eb) it takes me to a 24C02 datasheet. I'm going to try that one out today and see what happens.

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

Well, if that was the chip, either the EEPROM reset didn't do the trick, or it didn't help. I'm sure there has to be a replaceable component causing this issue, I just have no idea what or where.

[tom66]

Re: Samsung LN40B650 Standby light on, won't turn on

My personal opinion with all these "bricked" Samsungs is the firmware on the main board is getting corrupted perhaps due to a software bug or perhaps due to a faulty firmware update.

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

from what I've been seeing, people have hacked firmwares out there for these things, to allow additional smart apps than what the TV normally allows. I'm betting that's where a lot of it comes from, too. In this case, I wasn't sure if the guy I bought it from had tried to do something like that or not, so I figured I'd try the EEPROM reset just as a way of weeding out possibilities.

One thing I noticed that it didn't do before, but appears to do now, trying to turn it on from the front panel does nothing, but when using the remote the standby light will turn off, but the TV still doesn't light up.

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

New mainboard is in, and it looks *GORGEOUS*. My wife is already talking about wanting to replace the DLP with and LCD now. Speaking of the DLP, it's in the background of the second and third pics, and the third pic also contains the little hands that pressed the power button on the DLP for that last, fatal time. Now that I have the new mainboard, I'll tinker with pulling components off the old one and testing them to see what might have failed. Thanks again for all the help! If/when I'm able to figure out what went wrong with the old board, I'll post here and let you all know.

[budm]

Re: Samsung LN40B650 Standby light on, won't turn on

Thanks for posting the final result.

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

Thanks for posting the final result.

No problem. Once I get that DLP running again, this puppy is going up on the bedroom wall!

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

SO )*&#$(*#&$#Q@&$ PO'd right now. Word of advice - avoid eBay seller "parts4pros".

I just want to say one more thing here - ignore my previous statement about this guy. He has truly gone above and beyond to make things right in this situation, and thanks to his kindness and generosity, I have the LED Driver board for my DLP TV on its way to me now.

[withalligators]

Re: Samsung LN40B650 Standby light on, won't turn on

You should consider editing the post in which you bad mouthed him then. That may show up in searches or whatever.

[tom66]

Re: Samsung LN40B650 Standby light on, won't turn on

You can't edit posts after 90 minutes on this forum, unless you have moderator privileges.

[Tiezane]

Re: Samsung LN40B650 Standby light on, won't turn on

Thanks Tom, I was digging around trying to find that. That's why I quoted it and added the comment, this guy really did go above and beyond, I mean REALLY above and beyond. He compensated me for the board I had to buy, he was actually going to buy the LED Driver for the DLP, but it sold out, so he sent me more than enough money to buy it from another distributor who had it in stock. Needless to say, I revised my feedback for him. If you are looking for parts, he really does want to make sure his customers are happy!

[phil@philporter.com]

Re: Samsung LN40B650 Standby light on, won't turn on

I'm having identical symptons as you on a LN40B550. I'm thinking the main board is the culprit, too. Did you ever figure it out? By the way, I left Raleigh in '78 and now live at Hilton Head. Still get up there to visit folks who live near Meredith college. Thanks for any help you can give.

[phil@philporter.com]

Re: Samsung LN40B650 Standby light on, won't turn on

Never mind - I didn't read far enough. Looks like you did replace the main board and fixed it. Thanks.