Hi, this is the mobo of an aio, the ms-ac17.
I'm searching for the schematic but also boardview can help because there are no labels near the components.
Here my attempt with photos: [url]https://www.badcaps.net/forum/showthread.php?p=1158196[/url]
Thanks.https://Hi, this is the mobo of an a...br />
Thanks.Hi, this is the mobo of an aio, the ms-ac17.
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
MSI MS-AC171 rev:1.0
-
Re: MSI AIO MS-AC17 no power
Hi, thanks for answering.
I made some photos and studied the board.
On the backside there's the TPS51125 Dual-Synchronous, Step-Down Controller that controls the 2 lines i was studing obtaining 5V (big coil) and 3,3V (little coil). It's not running. It has and internal ldo for producing 3,3V and 5V for standby, i checked pins 8 and 17 and indeed there are 3,3V and 5V but i did not find where those line are used. Enable pin has 1,8V and Reference 2V so it should startup i think.
Wandering around the board i found a power supply near...Last edited by Dumah Brazorf; 08-22-2022, 03:32 PM.
-
MSI AIO MS-AC17 no power
It's a desktop but is notebook hardware (19V 6.32A) with big screen.
At the moment I measure 19V after the first (and only?) mosfet then there's 2 power supply that are completely shut-off. I'm not sure if one of them is 3.3V which is not present around the superio and the power button. I have not found shorts except both the first mosfets of the 2 power supply mentioned have gate and source connected (shorted? both? ic driver kaput?). I have a thermocamera and with the power supply connected everything is stone cold.
I'd really appreciate if someone have the schematic.
...Last edited by Dumah Brazorf; 08-22-2022, 06:51 AM.
-
-
Dell Vostro 5590
Hi, i'm searching for the schematic of a Dell Vostro 5590 board Mantis CML MB 18778-1.
Thanks.
-
Re: Apple Cinema Display A1267 no backlight no image on the screen
You need a power supply with limiting current.
Inject power on the line that is shorted limiting the current to a couple of amps and use your finger to detect the offending capacitor (most of the times) or whatever it is.
Leave a comment:
-
Re: Asus x555ld rev 2.0 no power
I don't see how it could work without the onboard ram.
Leave a comment:
-
Re: Acer E5-411 No Power
Is the cmos battery good? Have you reset the cmos?
Leave a comment:
-
Re: Lenovo 20v usb type-C adapter
Bad idea. The supply starts working with 5V to be suitable for all types of devices.
The device then negotiate for 20V. If you connect directly 20V you could burn something, it's not intended behaviour.
Leave a comment:
-
Re: Macbook Air A1466 No image
Check the hall sensor area for the open lid function.
I think rossmann once made a video on this.
Leave a comment:
-
Re: Dell 1908FPt monitor no backlight
Can be a problem on the power board (caps, lamps mosfets, lamps trasformers) or bad ccfls, or both. Did you recognize any color changes in the image when backlight was working, on the pink/reddish near top or bottom of the screen?
Just open it and take photos of the power board. There's high voltage involved so if you're not familiar trash it.Last edited by Dumah Brazorf; 08-20-2020, 07:51 AM.
Leave a comment:
-
Re: ACER E1-410 all usb ports not working
Just follow the usb_pwr_en signal (use the search function) and you'll see the signal comes from the superIO chip (nuvoton NPCE781LA0DX-GP).
So the superIO chip is bad or simply frozen. Have you tryed to reset the bios removing all sources of power? external power, main battery and cmos battery.
EDIT: I see then usb_pwr_en line is active low so 0V enables the chips. If they don't output power and you have changed one you should check the output line for short.Last edited by Dumah Brazorf; 08-20-2020, 08:14 AM.
Leave a comment:
-
Re: Lenovo 135W charger
Usually when the fuse is blown probably the main mosfet has failed and also the main bridge rectifier is gone. The main cap can also be gone for age and heat.
Leave a comment:
-
Re: Remote control board problem
Follow the traces from a non working button to che chip and try to short them.
BTW you can probably find the exact remote new on aliexp for few bucks...Last edited by Dumah Brazorf; 03-27-2020, 06:21 AM.
Leave a comment:
-
Re: LG 22EN43T not start
I quote the suggestion to try another power supply.
Crack it open, bulged caps should be there.
Leave a comment:
No activity results to display
Show More
Leave a comment: