HP ProBook 455 G7(DA0X9MMB8F0), fixed bad RAM power rail, laptop works, but now automatically turns on after AC is connected

[dit3]

Hello everybody,
I got HP ProBook 455 G7 which originally turned on partially(fans on 100%) and hen off after 8 seconds, with AC diode flashing orange and last flash white. This behaviour stayed for a while, but before I realised that there is power delivery issue and not BIOS problem, laptop started to automatically turn on after 2 seconds when in turned off, kept power cycling. So after I fixed shorted cap and burned ferrite bead, laptop turned on fine and booted to windows.

Now, laptop can be turned off and it stays like that... unless you plug adapter again, which triggers power on. Also I noticed that power-on happens when I re-connect main battery.

I would be glad for any suggestions on this issue as I never encountered similar behaviour.

[Stevedb]

Does it have cmos battery , does it heve 3v

[dit3]

Yes, I just measured its voltage and its 2.95V, I measured it at connector. Also I have disconnected main battery to see if will time reset and RTC stayed on time. After I connected the main battery back, laptop turned on by itself of corse :/

[mcplslg123]

Seems like a RTC issue. Status of RTCRST# & SRTCRST# with no power attached and only cmos cell inserted.

[dit3]

Thank you for sugestions, but I was trying to find this signal in the shema and dont see anything like that... any RTC mentionings are RTC_CLK_APU_C, RTC_CLK_KBC, +3V_RTC, VDDBT_RTC :/ Any tips on where to find it? These should got to EC chip, right?