Re: Sceptre X405BV-FHD3HF02205 no power
OK. I.m not experienced at this and have a couple of questions. To test the fuse I removed the shrinkwrap not knowing I needed to flip the board over. woiuldn't think so, but does that shrinkwap need to be replaced? Next, when checking the voltage on the cap will polarity matter connecting the meter? Any safety tips other than don't touch anything with bare hands?
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Re: Sceptre X405BV-FHD3HF02205 no power
We need to find out of you do have about 150~160VDC betweeen the two legs of the main filter cap (the big cap laying on its side).
You must be real careful since you will be working in the HOT DEADLY side of the circuit.
Sceptre KW-PIV400102A Power Supply Backlight Inverter
http://www.shopjimmy.com/sceptre-kw-...-inverter.htm#Attached FilesLast edited by budm; 01-30-2016, 12:12 PM.Leave a comment:
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Re: Sceptre X405BV-FHD3HF02205 no power
OK. I think the fuse is good. I get 0 ohms on the dmm. That was after a few seconds of fluctuating readings.Leave a comment:
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Re: Sceptre X405BV-FHD3HF02205 no power
On the top left of the board, there is a part listed as F1. That's the fuse. Meter that and see if it's not blown. If it is, there could be more wrong with the power supply but let's start with that.Leave a comment:
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Re: Sceptre X405BV-FHD3HF02205 no power
OK. Attached is a picture of the whole back and one of the other main boardAttached FilesLeave a comment:
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Re: Sceptre X405BV-FHD3HF02205 no power
Are talking about the parts with LA1, LA2, LA3, and LA4 designators? Those are inductors for the output filter for the Class D power amplifiers outputs.
Please up load the pictures of the whole back side of the TV so we can see all the boards.Leave a comment:
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Sceptre X405BV-FHD3HF02205 no power
My sceptre lcd tv picture picture failed recently. The red light on the front doesn't come on and I understand from the troubleshooting guides that something in the power path has failed. I found an old thread on this tv that I will go through in detail, but I wanted to post a picture that shows some suspicious looking caps first and get an opinion. I don't have a setting on my phone camera that matches the max resolution so I picked something that was closest. I hope that is ok and appreciate any help. The caps in question are 4 on the right side of the picture ( the board is actually show upside down). The tops are grey instead of metallic silver, so I wonder if they are bad. I'd also appreciate info on where to find board schematics and other technical info for the tv.Attached Files -
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly ‘new' Tcon board this time, and... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
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