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?

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 :/

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...

Thank you so much Rezistor!!

I found the faulty part, but it evaporated and board has no labels.

Any chance somebody has boardview?

Hello,
can anybody help me finding board schematic and diagram for this HP laptop?

Thank you

Hello,
I am diagnosing my daughters laptop motherboard, its HP(8th Gen i5, dGPU) laptop with G35N motherboard, it turns on for a second and then off(without fan spinning). I found some loose screw inside(display hinge stuck), pointing to possible short caused by it, so far I tracked fault on +3V and +1.2V, I have fixed 3V issue by replacing TPS22976DPUT, but found faulty 1.2 just recently and I wanted to try out injecting it externally, to see if it comes to life.... me being impatient I tried to inject 1.2V(2A limited) from my dodgy power supply with my voltage probe hooked up and I noticed...

Re: New Members - please post your introductions here

Hello everybody,
let me introduce myself as I am new to this forum. My name is Adam and I am from Brno, Czech Republic. I work as software developer, primarily C++, Python and as a hoby I do a lot of tinkering with embedded systems and home automation. I also do some fixing of a PC for my family or friends, which is exactly how I got here , while trying to find out schematic for my daughter's dead laptop.