ELEMENT ELEFQ462 led/lcd power problem

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66-Budm,

a couple of observations. looking more closely at the circuit board, it appears that the tab of the smd is also connected to TP8, which on the back of the board says 3.3V stdby. would this smd be providing the 3.3v stdby? also, near the smd is a 8 pin device labeled U10. could this device be faulty. it's almost impossible to read any markings on the device.

I may attempt Budm's way of trying to find the shorted device. the trace is almost impossible to track between devices. it's not obvious where the trace is going from device to device.

a schematic would invaluable right now. do you think I should open another post looking for a schematic for the main board or the tv set?

a frustrated camper!

thanks guys,

frank

[tom66]

Re: ELEMENT ELEFQ462 led/lcd power problem

Are there any part #s on the main board?
You can see if the board is used in other sets, to see if these have service manuals.
I cannot find one for this set.

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66,

pics of the main board. I found a few online that are exactly the same in appearance, but the number on the white label is different from mine.
mine is 1104H0548H, not compatible?

frank

[tom66]

Re: ELEMENT ELEFQ462 led/lcd power problem

If the board is the same base type (CV318H-A) plus it uses the same LCD panel e.g. Samsung it will work... good TV parts companies will note the panel the parts are pulled from.

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66,

Thanks Tom that's very interesting. I did see a number of CV318H-A boards with different numeric numbers than mine. how important is that number when hunting a board? what is that number 1104H0548H labeled on then board.

is this the panel number in the picture? I saw one board with 1107H1071 and it had all of the same connectors and appeared to be identical.

you never answered my last question about the 3.3v stdby that seems to be connected to the tab of the smd and is shorted to gnd, as being the cause of the TV not working? does that have anything to do with bl_on?

thanks a bunch, not giving up on this one yet!

frank

[tom66]

Re: ELEMENT ELEFQ462 led/lcd power problem

Yeah, that's the panel number.
I don't know about the 3.3V, I'm not sure..
I also don't know what each number means, every manufacturer is different.

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66-Budm,

Thanks Tom and Budm. I checked with shopjimmy here in the usa and they have 3 of the boards that match my number on the main board. $89.95, + shipping, a bit pricey. I thought main boards weren't that expensive! I haven't given up on troubleshooting my board, but I'll have to consider shopjimmy before too long. I asked if the boards were new or refurbished, and this is what he replied:


Joe, Aug 17 13:31 (CDT):

Hi Frank!
Yep, we've got that board in stock:
http://www.shopjimmy.com/element-110...r-elefq462.htm
Our parts are "reclaimed" or "harvested." Technically, we can't say they're "new" because they don't have an OEM number and we didn't purchase them from the manufacturer. But, they're not "used" because we reclaimed them from new TVs damaged during shipping.

Regards,
Joe,
Customer Service Representative

Thanks for your patience and comments,

frank

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66-Budm and company,

I ordered a main board from shopjimmy, slapped it in and it worked (I think). I have a blue screen and a menu displayed on the screen. however, as you can see from the picture, I now have about a 6 inch vertical stripe of just white.

what's next? I tried to flex a connector on that side of the screen, but no change. help!

thanks very much

frank

[tom66]

Re: ELEMENT ELEFQ462 led/lcd power problem

Sadly, I think the panel is bad -- possibly water damaged. If you're careful, you may be able to clean off the water damage around that flex, by taking off the frame around the LCD.

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66,

oh, no. has to be panel and not a board, right? before I disassemble the back, can I access the panel connectors to get a visual of what may be there? Is it usually corresion on the connectors or can it be burnt ?

thanks,

frank

[tom66]

Re: ELEMENT ELEFQ462 led/lcd power problem

You'll have to take the frame apart unfortunately to get to the panel tabs. If you're careful it's not too difficult.
If it's any conciliation the TV would have shown this fault before the main board went bad, so the people you bought it off probably didn't mention it.

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66,

I guess you live and learn from mistakes. I'll try and remove the frame. do I keep the tv face down (screen down) like I have right now. from my last picture of the complete set, the bottom of the screen is at the top of the picture (closest to the work bench). are the connectors I need to access at the bottom of the picture, or where the T-conn board is? sorry for the dumb questions.

thank you,

frank

[tom66]

Re: ELEMENT ELEFQ462 led/lcd power problem

The panel is upside-down on these models (t-con and tabs at bottom); this makes it a lot more vulnerable to water damage. It's designed to stop early tab bond failures but increases water damage problems, converting a problem which is generally fixable into one which is much harder to fix.

And this is not your mistake.

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66,

Thanks Tom, I'll get to and evaluate the connections.

thanks you,

frank

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66 & company,

Tom, you were right on the money, corrosion and more corrosion! what can be done about it? a few pics. some of the lands that are not within the connector have corrosion between them, is it worth a shot to try and clean any of it if possible? am I doomed?

thanks for your patience and understanding,

frank

[tom66]

Re: ELEMENT ELEFQ462 led/lcd power problem

You can try using isopropyl alcohol to clean that, but I fear it is not repairable. One user did have luck before, though.

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66,

can I remove the one cable from the t-conn board to allow a little more swing out room on the narrow board that has the 3 the tab bonds for the left side of the screen? is it the in between corrosion of the tab bond connection on the narrow board causing the problem? what about using a small eraser???

thanks very much Tom.

frank

[tom66]

Re: ELEMENT ELEFQ462 led/lcd power problem

You can remove the t-con connector, careful not to break the latch. The panel connectors (tab bonds) must not be disconnected.

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66,

OK Tom, I'll give it a shot.

Thanks,

frank

[ilikesteel]

Re: ELEMENT ELEFQ462 led/lcd power problem

Tom66 & company,

NO good Tom, the corrosion etched away a bunch of the thin connections from the board to the cable that was attached to it. looks like the operation was a success (board swap), but the patient died from other causes!

I'll try and return the main board to shopjimmy hopefully to reduce the loss!
I guess I could try and sell the remainder of the boards because I know they're good. is ebay the place to sell the boards?

Thanks for all your help, and Budm and everyone who responded to this post.

with much respect and gratitude,

frank