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Re: Toshiba Satellite L500 - No power on
Hi anybody can suggest me anything , what can i burned when removed PQ14 ???????Comment
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Re: Toshiba Satellite L500 - No power on
Hi, I'm not the expert, but I'll trying to explain what I already know.
Old compal design a little bit different than new, newer mobo which released it 2012 till latest
- the old compal using IC comparator LM393 as vin detector and precharge circuit.
- power button has 15-17v
- push pull transistor used to protection circuit if there are over voltages or over currents to flow to main rail (B+) in this case PQ11 and PQ14. if B+ was ok both of them work together can send "command on" via gate mosfet PQ8 and PQ9 and vice versa
- need more attention understanding schematic and of course spending your time.
- finally, read.... many threads on this forum about power issue, many people has experience likes whaldsz, atsio, khaahk, th3_uniqu3, dycc, highpulse, dj_ricoh and the others that can't I mentioned one by oneComment
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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 guys,
So, I've been racking my brains on this one.
I have a Satellite C50-A which I'm repairing for a friend.
I recently replaced the main board due to failure.
Following this, absolutely everything works perfectly, except for the fact it won't power down.
Initially, shutting down via Windows would shut the OS down, screen would turn off (noticed the lighter black go to what looks like the darker black powered off screen as though the backlights have powered off), however the laptop was still running internally with a spinning... -
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... -
Toshiba Satellite L500 Series Laptop Schematic
LA-4982P...11-01-2024, 02:40 AM
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