In my monitor the display S-PVA Samsung LTM201U1 is installed, it is powered by a voltage of 5v to 12v in where to use?
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Re: Dell 2007WFP Won't Power On
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MEB thanks for the schematic!
My 2007WFB rev a00 had Q2 populated as well.
Q2 is 5V output and its switched on via a signal from the cpu.
It is used to power the LCD and it goes straight trough pins 9-10 to the Logic board and straight to the LCD harness plug. Q2 is driven by the 2OUT of U3 TL1451A via a signal line through the connector to the logic board, i forget which one.
When the monitor goes to sleep the 5V is shut down so if you test that board out of circuit the voltage will not be present.
Another note for all the 12V output for the speaker is switched off until you plug something into the coax connector. This send a switch signal to the U4 TL1451A to turn the mosfet on via pin 2OUT.
Thanks to everyone most importantly to budm for his work. In my case it was the 2.7k resistor on U4 TL1451.
The very last thought is; there must be a reason they squirted the silicon on that one of four TL1451 pwn controllers. My unanswered question is why? Heat? Insulation? Anyone?Comment
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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. π
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 everyone,
Looking for some advice or opinions on what to do with a monitor issue Iβve run into. Apologies in advance is this crossovers a few forum categories.
I have a Dell U3425WE, which I've recently replaced with another model. That said, the original unit is still fully functional in terms of the display β it works perfectly over HDMI and DisplayPort. However, the USB-C and Thunderbolt 4 ports have stopped functioning correctly. The Issue:- The 90W Thunderbolt 4 port (circled in the photo) no longer charges or powers any device, including laptops or MacBooks.
- Thereβs
Today, 04:55 AM -
Hi guys,
This is my first post! π
I have no idea what Iβm doing, but Iβm learning by trial and error.
Iβm currently working on a Dell Optiplex AIO 7490βone of a bunch of AIOs that mysteriously failed to POST just a few days after the warranty expired. The original issue was that the PC worked fine until it was rebooted, after which it got stuck on a black screen (no backlight), with fans spinning at normal speed and a solid white power LED. Forcing it off by holding the power button would just cause it to switch on automatically and get stuck again on...07-04-2025, 12:54 PM -
hey guys, hoping for some pointers to repair an eBay bought "faulty" laptop.
Ill try and give as much info as I can.
Dell Inspiron 17 (7786) Laptop
Service Tag: 5J0NHT2
Bios: 1.9.0
When I received this , it would only flicker on the KB backlight for a second, then off and on.
Then it started getting weirder!
Sometimes when attaching the AC power supply, and pressing various pre-boot diagnostic keyboard keys... it did try to boot, in fact out of a hundred attempts, the laptop did actually boot into the Bios ! but never has...
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