I have an ms-16p51 here for repair. When you plug in the power it was getting no light, so I've flashed the bios and now getting a light, but still not turning on. 3.3v and 5v always on are present and the power button is getting 3.3 and dropping when pressed. Also when the power button is pressed the bios is getting 3.3 for a few seconds, but nothing else then turns on. Under thermals the only thing I see getting warm is the chip that supplies 3.3 and 5v, can't see any heat in anything else.
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Re: ms-16p51 not turning on
Check ldo pins for short? -
Did you find a fix? I have the same board with the same problem, it won't power up. I would sometimes get 1/2 second blink of the power light and a really short fan sound and then nothing. I suspect the power subsystem and have downloaded the schematic but it would help to hear what you've already tried.Comment
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Dell Vostro 5490
Service Tag: G8T7NW2
Motherboard Model: Mantis CML 18778-1
Schematics: Attached in the Google Drive folder.
BRD File: Attached in the Google Drive folder.
Video of the issue: https://youtu.be/bIXaiiub664 (Also on Google Drive)
Google Drive link: https://drive.google.com/drive/folde...j_?usp=sharing
I've attached Resistance Readings at 200ohms range. Voltage Readings, with and without power button being pressed. Detailed board pictures. Old and new BIOS files attached.
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Hello.
I received a bios locked 7410 with 25Q256JVEQ ,i dump the bios, unlocked it and flash it back, since then the laptop has no life signs at all except amber led on for as long the power button is pressed, nothing else.
Fact #1 i was unaware that 25Q256JVEQ is 3.3v and i used a 5v CH341A to program it, not sure if the chip got damaged but since then i can read it and write it normally, doesn't seem dead.
Fact #2 i modded the CH341A to 3.3v, same results with programming though, nothing changed.
Fact #3 i tried hard reset with cmos/main battery disconnected and power... -
HP 450 g1 keeps turning on even tho I shutdown/sleep . one way to stop the turning on cycle is pressing the power button few seconds thus force powering it off. But then sometimes it does not turn on at all but next day I try again to turn it on and it turns on....
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Hello
A device with specifications
Toshiba Satellite PRO A50-A is here to replace the hard drive.
The hard drive has been replaced and there is no problem, but there is another problem, but the customer does not care to fix the problem.
The device enters Windows without any problem and works, even I put pressure on the CPU and graphics, but when I turn off the system through Windows, if I want to turn it on again, the system switches, but it turns off quickly within a second, and this routine continues. It is turning on and off within a second and soon it turns off.... -
Recently staring turning off more often, brightens set at 50% - monitor back side in PSU area is very warm to touch, also at front left corner getting hot.
When changed brightens set at 30% no longer turning off , and no longer I can feel any heat in this areas.
This can be signs of bad capacitors causing overheating PSU ?
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