Sceptre X405BV-FHD3HF02205 no power

[kahall]

Re: Sceptre X405BV-FHD3HF02205 no power

So I got the eeprom today.
I am a tech type person but soldering is not something I have done a lot of but I have basic skills and can do it.
Removing the old one from the board and cleaning up remnants of it went well but getting the new one soldered on was tough for me.

First of all the part is small and I could barely see it with my glasses on and a magnifying glass did not help much either.

After I soldered it back on as best I could I took a pic of it with my phone and zoomed in. It looked horrible but I plugged it in and it appeared to work. What I mean is the TV would turn on and off just fine but I had no menus or picture.
Thinking I must have accidentally cross soldered some of the little legs or whatever you call them from the eeprom together I went back and cleaned them up a bit.
I then had menus and a picture and I have turned it off and on with varying times in between for a few hours now and it works fine. Before I replaced eeprom if you turned it off it would not come back on unless you unplugged/plugged back in several times and held in power button nonsense.

If it starts acting up again I will let you know but right now it seems fine.

[kahall]

Re: Sceptre X405BV-FHD3HF02205 no power

https://www.shopjimmy.com/sceptre-x4...eprom-only.htm
can you let us know if the replacement eeprom fixes your set

Sure, I will do that.

[vinceroger69]

Re: Sceptre X405BV-FHD3HF02205 no power

https://www.shopjimmy.com/sceptre-x4...eprom-only.htm
can you let us know if the replacement eeprom fixes your set

[kahall]

Re: Sceptre X405BV-FHD3HF02205 no power

You need to look at the main board sticker, for example of what shopjimmy say about one of the EEPROM "This eeprom works in the main board that has 1B1K2826 & LTA400HM09 found on the sticker & works in Sceptre X405BV-FHD. The eeprom you receive may be different from your original but it is a compatible replacement. All sales are FINAL and NO RETURNS will be accepted."
So look for sticker label on the main board.

Yes and thanks. Shopjimmy informed me of same and I just finished doing that and found the one that matches the numbers on the sticker on the back of the board. It's this one if anyone cares. https://******/2xuCdQf.

[budm]

Re: Sceptre X405BV-FHD3HF02205 no power

You need to look at the main board sticker, for example of what shopjimmy say about one of the EEPROM "This eeprom works in the main board that has 1B1K2826 & LTA400HM09 found on the sticker & works in Sceptre X405BV-FHD. The eeprom you receive may be different from your original but it is a compatible replacement. All sales are FINAL and NO RETURNS will be accepted."
So look for sticker label on the main board.

[kahall]

Re: Sceptre X405BV-FHD3HF02205 no power

just confirm before you order one as i see their aer a few listed for this tv model, so maybe send them a message first and see if they have the correct one for your set as it needs to match the lcd panel used in your tv.

Thanks for that as well.
The P/N on my TV is X405BV-FHD3HA10001 and I don't see one for that exact P/N as they suggest should match on some of the eeproms for similar models. I sent them a message to see if they could help me out with the right one. Meanwhile I will pull the back off and see if there are any clues on the board that might help.

[vinceroger69]

Re: Sceptre X405BV-FHD3HF02205 no power

Oh, I see that now. Thanks for the tip.

just confirm before you order one as i see their aer a few listed for this tv model, so maybe send them a message first and see if they have the correct one for your set as it needs to match the lcd panel used in your tv.

[kahall]

Re: Sceptre X405BV-FHD3HF02205 no power

if you look on the shopjimmy web site im sure when you search for the eeprom it gives the board number location

Oh, I see that now. Thanks for the tip.

[vinceroger69]

Re: Sceptre X405BV-FHD3HF02205 no power

I have repaired this TV once and posted in this thread a few years ago saying so. It now has the same symptoms as plbrand had on his and is still in the such a state that I can fiddle with the button and unplug/replug and get it to come on so I don't have it apart yet. plbrand replaced the eeprom which I am just going to try.

Would someone be so kind as to use one of the many pics of the board in this thread and point out where the eeprom is?


I can handle it from there.

Thanks!

if you look on the shopjimmy web site im sure when you search for the eeprom it gives the board number location

[kahall]

Re: Sceptre X405BV-FHD3HF02205 no power

I have repaired this TV once and posted in this thread a few years ago saying so. It now has the same symptoms as plbrand had on his and is still in the such a state that I can fiddle with the button and unplug/replug and get it to come on so I don't have it apart yet. plbrand replaced the eeprom which I am just going to try.

Would someone be so kind as to use one of the many pics of the board in this thread and point out where the eeprom is?


I can handle it from there.

Thanks!

[vinceroger69]

Re: Sceptre X405BV-FHD3HF02205 no power

try freeze spray on the eeprom ic if the set now starts up ok you can remove the ic and freeze it again and copy the data the write the data back too a new ic i know this is not the same make of tv but this video gives you a idea what too try
https://www.youtube.com/watch?v=Qy8f...t=WL&index=114

[coolbone83]

Re: Sceptre X405BV-FHD3HF02205 no power

Hi everyone, sorry to bring this back from the dead. I am having the same problem that plbrand was having with his sceptre tv. STBY light on...won't power on. Same model, same boards. I am also getting the same readings on the pins. Is there a way to bypass the main board with a jumper so i know for sure that it is the problem? I am having trouble finding an EEPROM that matches my board #s exactly and according to shopjimmy it has to be EXACT....the closest is 1 number off. According to SCEPTRE they sell the whole board...but I would still like to be sure. Thank you,

Trevor

[kahall]

Re: Sceptre X405BV-FHD3HF02205 no power

Hello, This is my first real post here other than the intro.
It looks like there have been 2 successful repairs to this model from this thread and I just wanted to let you know there are now 3.
I have one of these that just quit about 10 days ago. I googled around and came upon this thread. I followed what was posted on the 1st page and when I saw the results for diodes D10, 22, 23 and my D10 was reading 0v compared to the others I gambled and figured that was the culprit since my results were similar to the original posters. Ordered it from digikey, received it today and soldered it in place and so far so good. It's working as it was before.
I actually enjoyed fixing it and saved $300 or so.
I'm going to keep my eyes peeled for others with T.V. issues and try to repair those as well as I have free time I need to fill so I will be back.
Thanks,
Kirk

[plbrand]

Re: Sceptre X405BV-FHD3HF02205 no power

Bought a replacement EEPROM from ShopJimmy, soldered it in and TV works perfectly.

Thank you guys for your help and guidance.

Paul

[ReeceyBurger123]

Re: Sceptre X405BV-FHD3HF02205 no power

Yes epprom failure so common on these junks.

[plbrand]

Re: Sceptre X405BV-FHD3HF02205 no power

Is it likely that the EEPROM on this board has failed? I notice the replacements are commonly available. Would this be worth a try?

Thanks again for all your help.

Paul

[plbrand]

Re: Sceptre X405BV-FHD3HF02205 no power

Voltages do not change on BL-ON or PS-ON when the power switch is pushed on/off.

The part number for U1 (UA1) is:

TPA3110LD2
23Tg4
CO4L

The part number for the large chip U100 is:
MSD3391DS
A7MHA93ZB
1214D

Thanks again, if you guys are willing to continue to try, so am I!

Paul

[budm]

Re: Sceptre X405BV-FHD3HF02205 no power

BTW, the PS-ON should toggle HIGH and LOW when power switch is togGle on and OFF, if not, then you have problem with not just the BL-ON signal but the PS-ON too.
At this point it is safe to say that the problem is on the main board.

[dick_barton]

Re: Sceptre X405BV-FHD3HF02205 no power

So Budm is correct and you are missing the Backlight On from the main board for some reason.

Edit:
Whats the part number on U1 on the underside of the board?

[plbrand]

Re: Sceptre X405BV-FHD3HF02205 no power

Connector 4 voltages are shown on the attached document. "BL-ON" voltage appears to be .20

Paul