Re: Sceptre X505BV, blue LED, no display

Considering that I was able to confirm that the backlight was good and the fact that the TV worked fine with a good picture as it took longer and longer to come on, my best guess was that the T-con strip along the bottom of the panel was good and that the problem seemed to be isolated to the mainboard. With the mainboard connected, I continued to get the 13.5v on the 12v rail that would drop down to 13.3v after about 40 minutes. I was able to probe a few testpoints on the mainboard showing 3.3v and 1.8v on some of the labeled pads on the...

Re: Sceptre X505BV, blue LED, no display

I tried heating up the caps on the cold side of the board. The only voltage that changed was the 24.7v went up to 25.2v, then once the board cooled down it went back to 24.7v. The 5v remained at 5.13 and the 12v remained at 13.5v.

After this, I unplugged the cables from the mainboard to take it out of the picture, jumpered the PS/ON to the 5VSB with a 1k resistor and measured again:

24v = 22v

12v = 12.2v

5v = still holding at 5.13v

After that I also added another jumper...

Re: Sceptre X505BV, blue LED, no display

Yes, I was thinking of trying to heat up the 5 larger electrolytic caps nearest the connectors a few days ago. Wasn't sure if I might wreck something else doing that, though. I'm going to try to get a magnifying glass from a neighbor to see if I can find which one might go to the 12v regulator (if I can find which one that might be) following the land traces over the weekend. Other thought was trying to channel the heat just to those caps using a couple pieces of cardboard to sort of protect anything on either side. We had a portable cap...

Re: Sceptre X505BV, blue LED, no display

Thanks for the response. I am trying to figure out if I can bring that 12v line to the correct level if I can determine which caps/regulators are involved. ShopJimmy does have the power board but not the mainboard available. I'm concerned that the mainboard may have been compromised due to the fact that I see no image with a flashlight, so I didn't want to buy just the power board and have that not help. Plus, I don't have a backlight tester and am unsure if I can jumper it safely in some manner to get power to the BL plug/jack to see if...

Hello all,

I have a Sceptre X505BV-FMDR8HJ1PE8 tv that had been gradually over time taking longer
and longer to come on, now it will no longer display any image. Original symptoms
are the red standby LED would turn to blue immediately when pressing the power on
button, but there would be a delay for the "SCEPTRE" image to appear on the screen
and backlight to come on. The delay kept getting longer, then it would go from blue
LED back to red. Then when I pressed the power on button again it would bring the
display up and work fine....

Re: New Members - please post your introductions here

Hello, I'm still trying to figure out how to start a new post on here. Don't know where my intro from last week went as all I see is the Quick Reply box. Peace.....Tom H.

Re: New Members - please post your introductions here

test......I only see "quick reply" option. I don't see a button to do a new post for introductions.