hp labtop 15-db008 Powers On then Shuts Off

[platinumsteel]

Hi guys have an issue with a friends labtop that has no signs of liquid damage.They said it just stopped turning on.When i press the power button it turns on normally like 35-500millamp draw and it posts and i have picture. But like after 4 seconds after it posts an image it shuts off completely.If i press power button again same thing happens. Did all basic troubleshooting with the motherboard like fresh thermal paste with it completely out the chasis with battery disconnected. Thermal camera shows these two mosfets heating up more than anything else when i press the power button.I have provided a picture of the mosfet location on the board which are heating up I assume to be the Mosfets for the CPU.Which measure 30 ohms resistance on the coil. And I also have 2x new replacement mosfets that i think are the same. Possiblly you all can kindly confirm that these two mosfets are the same?

onboard mosfets = PK616BA
replacement mosfets = AON6414A

Do you guys think it might be a bad mosfet or maybe a bad Bios ? Or you think it might just be normal heating or working temps of the mosfets and i should try a good bios first ?

[mcplslg123]

Re: hp labtop 15-db008 Powers On then Shuts Off

A little bit of heating is expected on that area.6414A is compatible as replacement. No harm in trying for bios flash but since its an amd apu,may be its dying.

[platinumsteel]

Re: hp labtop 15-db008 Powers On then Shuts Off

Thanks for the reply my friend. You were right the mosfets are indeed compatible. Because its doing the same thing. Shutting off a few seconds after power on.First thing i did was a bios flash.Same issue.Then did the mosfets swap and same issue.So as u mentioned maybe the APU is dying.So will give up on this one.Thanks again.