Hello all, my Sceptre cut out on me :/. I don't get anything. No lights, power, nada. I'm fairly competent with electronics, but have no idea where to start with TVs. Anyone willing to help me get this thing back up and going? I'd lvoe the opportunity to learn about it. I've attached the pictures of the two boards.
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Sceptre 409BV-FHDU8HJ1L02 dead
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
So, looking at my DMM, I realize I don't have capacitance measurements. Will that be a problem?
I don't seem to get any voltage on cn5/6 or any other of the wires leading off the board. I tested them with a wire poking each one (while the connecter was still on it). The voltage across the main cap is 166.5v. I will get the other caps in the morning.
Thank you for your help so far!
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
Using your meter set to dc volts can you carefully measure the voltage between the two legs of capacitor C64.
It's on the live side of the mains supply so be careful taking the measurement.Last edited by dick_barton; 08-10-2016, 03:40 AM.Willing to help but I'm no expert.
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
So, right now I am getting nothing. I measured with two different DMM. When I measured it earlier in this post, I had 166.5V.
So partial side story, when I was getting the measurements, I had the power board on its side. I guess I pushed it a bit too much, and something grounded with the back of the tv (i think). There was a spark and the fuse to the room popped.
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
If you shorted the board there are more than likely more blown component's than what you were originally dealing with, i would suggest replacing that board completely with a replacement from shopjimmy.com or ebay, depending on availability, but you may also want to consider a new set, as there is a possibility that when you grounded the live board you may have damaged something else other than the power supply. And replacing multiple boards can get costly.
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
Ok, so, I replaced the power supply. Success... sort of..
It worked for a night just fine. I thought I was in the clear, but the next day, we were watching it and the screen turned off, though we still had sound. I unplugged it, plugged it back in and had image again. However, after we turned it off that night, it hasn't given me an image back. I still have sound, but the screen wont turn on.
Think you could help me troubleshoot this?
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
I think you have to explain much better what your issue is. No image... what do you mean? Are the backlights out? With everything plugged in and TV running, check the BLon and adj pin on the PSU.
When you turn the TV on, do the backlights come on for a second and then shut off? Do that in a dark room, or look into the vents on the back of the TV.
What does the LED indicator on front of the TV do?
In other words, you either got a main board problem (EEPROM) or a backlight inverter problem. For shits and giggles, freeze the EEPROM on the mainboard with a can of air upside down and turn the TV on. I think I gave you enough for now on your "To Do List".Last edited by CapLeaker; 08-28-2016, 02:30 PM.
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Re: Sceptre 409BV-FHDU8HJ1L02 dead
Cool, thanks. I will do that tonight. Just a little more background - The tv had sound, but no image. I checked with a flashlight, but didn't see anything. The front led does change from red to blue when I press the power on.
I'll let you know the results of that stuff tonight.
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