My power supply the 18v and 24v drop to 0 then back every 5 seconds. Green wire gets 2.7v and drops to 2.6 in same cycling. Blue wire 1.7 cycles to 0. Any help would be appreciated. Thanks
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Re: FSP271-4f01 power cycles
Thanks for the reply. I will check the items you listed and report back. I have an esr meter to check caps. The tv is an Olevia lt42hvi. I took off the main board (logic) and the power board stopped cycling. But the backlights did not go on even though 24v was going to the inverters. I guess the main board send a signal to the inverters to go on? Can I force the inverters on to see if current draw is causing a power board problem? Are there any schmatics for a lt42hvi?Comment
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Re: FSP271-4f01 power cycles
Thanks for the reply. I will check the items you listed and report back. I have an esr meter to check caps. The tv is an Olevia lt42hvi. I took off the main board (logic) and the power board stopped cycling. But the backlights did not go on even though 24v was going to the inverters. I guess the main board send a signal to the inverters to go on? Can I force the inverters on to see if current draw is causing a power board problem? Are there any schematics for a lt42hvi?Comment
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Re: FSP271-4f01 power cycles
Yes.
PlainBill talks about using a resistor to pull PS_ON highCan I force the inverters on to see if current draw is causing a power board problem?
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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... -
Hello everyone! This is my first post and this motherboard is driving me crazy because everything looks so non-trivial that I don't know where to start investigating. During these days I believe I watched half of the YouTube videos trying to understand how to troubleshoot power cycles but at the same time, I'm confused because my motherboard doesn't always do that and sometimes completes the POST for a few seconds: the right amount of time to freeze, show glitches on the screen, and then reset itself.
Let me give you a bit more context to understand why and how we got here.
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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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