Hello,
I got the UPS working today.
I replaced the Caps, Op-Amp and ADC.
At first it was reading the Bat voltage well again, but the line voltage was 100V less than it should (220)...
When I first had the problem I searched all over the web and someone at the EEVblog forum mentioned that APC UPSes sometimes have resistor problems.
I think the issue was in fact a soldering problem (solder joints). I resoldered the sensing resitors arround the ADC and assembled it all again.
It worked.
Lets see for how long .
Thanks.

Hello hcs77,

Just sending an update.

I found a schematic in a Portuguese forum of a different model (SU2200/2200XL/3000), but used it as reference, as it look identical.
I opened the UPS again and checked some of the voltages with a scope and used a thermal camera to look for possible problems.
The voltage at the ADC input was 3.12V for 50.6V at the batteries. The 5V, 12V and -8V looked good, though the last had (-8.77V) a bit more than -8...
The ADC is a TLC0838C. The quad Op-Amp (LF347) near the ADC is heating up a bit.
I'm going to buy the Electrolytic...

Hello there,

I have a issue with a tower UPS 3000XL with also an external battery tower that has almost new batteries and very little use.

A week ago it started entering boost mode because the read line voltage was below 210VAC, when it was in fact near 225 VAC.
The battery voltage was also low (48 or 49), when in fact the batteries are fully charged to 55.1 VDC.

I opened it up up, cleaned and tried a reset.
I updated lower transfer voltage to 196 with apctest and then used the serial port to adjust the configuration with a terminal in Prog mode...

Hi,
I found the laptop problem.
The 5V output was shunted to ground.
After some time with the multimeter I found that the problem was the USB Power switch on the port I connected that was damaged (G517).
After removing it the 5V output was working and the laptop was able to start.
Oredered a replacement.
Found the datasheet for the Power Switch in the Forum.
Thank you....

Hello,
I need your help finding the MSI GF63 12UDX (Board MS-16R81 VER_2.0) schematic.
I accidently inserted MSI USB a programmer that was connected to a board that has Neutral tied to GND, instead of connecting it to the USB-ISO that was on another port (Friday afternoon mistakes....).
Now it doesn't start. 😏
I've looked for burned parts but found none.
The 20V from the adapter are ok and the battery has 12V if I disconnect the battery plug.
I need the schematic to try to understand where there the problem may be or if it is repairable.
Thanks!...

Hello there,
I finally got it working.🎆
Changed the DMI and key data with an hex editor.
Programmed 1 and then a second flash, but for some reason it wouldn't start.
It was always showing 5 longs and 3 short pulses on caps lock led.
I decided to program another flash out of the laptop, instead of in circuit, and it worked...
Thank you [B][URL="https://www.badcaps.net/member/257580-qayyum786"]qayyum786[/URL][/B] and [B][URL="https://www.badcaps.net/member/257490-vesko356"]Vesko356[/URL]![/B]Hello there,
I finally got it working.🎆

Thank you Vesko356 for the help!
I'm searching the forum on how to transfer the DMI (data and key).
The new chip will arrive this week and also a different programmer.​
I'll reply again as soon as I have news.
Thank you again.

Thank you for the file!
I tried to flash the bios with it several times, but keeps failing the verify.
Checked the WP line and was ok.

Anyway, I boot up the laptop and it worked!
However, Product information is missing.
It boots to windows.

I'll have to buy another W25Q64 and program it with the file you sent.
Thank you again.

Hello,
I have an HP Omen Laptop 15" 15-ax004np (SN:5CD6242KJH).
Updated the BIOS from 2016 (F07) to the latest from 2020 (F56 revA) with HP application on Windows 10 (sp111733.exe).
All went well at first, programming and verifying. However the laptop didn't boot...
Got it open, removed battery, but still the same.
It has a Winbond W25Q64FV flash I managed to read it with Xgpro and a TL866ii.
The motherboard is a DAG35AMB8E0 REV:E.
I didn't find this laptop model in the forum, but there lots of threads about the mainboard.
If you guys can help...

Hello there,
My name is Camisão and I'm new here.
I'm from Portugal and I work with electronic, manly PCB design.
Looking to improve my HW knowledge in this forum.