LA-E991P +RTCVCC PROBLEM

[ProSis]

I have an Inspiron 15 Gaming 7577 Model device. motherboard code LA-E991P Rev 1.0.
The problem with the motherboard is that when I connect the bios battery, its voltage drops from 3v to 0.8.

0.8v comes to the 2nd leg of DC2 and around 0.6v comes out from the 1st leg.

But when I remove the bios battery and connect the adapter, 3v comes from the 3rd leg and 3v comes from the 1st leg without any problems and the device works without any problems.

and when I connect the bios battery, the device does not start.

DC2 was replaced and the problem remains the same. Has anyone encountered this before and found a solution?

[MOD EDIT] Link to boardview -> https://www.badcaps.net/forum/troubl...-7577-la-e992p

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[mcplslg123]

Its a PCH fault. What is the resistance to GND on RTCVCC(DC2,pin1)?

[ProSis]

Dc2 1. but not a short circuit.
When I remove the DC2 and draw a line from the 3rd leg to the 1st leg, 3V comes on without any problems and the computer works.

[mcplslg123]

Its Still seems like a PCH(RTC section) problem. You didnt shared the resistance i asked for in post#2

[ProSis]

1st leg resistance is around 0.5M (500K)

[mcplslg123]

The reading seems very healthy. really out of ideas what is causing this issue.