Dead Dell G7 17 7700 - burned mosfets and please help me: What is that part ?

[madfreak]

Hi, after overheating my laptop came into the dead zone...

DELL G7 17 7000
GTX 1660Ti
i7-10750H

The led indicator near battery is on ( while the charger is plugged in )


After shutting down suddenly, laptop is not powering on and i saw a fume that came from the heatsink...after I disassemble that heatsink i saw a burned mosfet near GPU and a " coil" near mosfer that is in CPU area.

Can You please tell me what is that part " coil ? / R152017H" or what is the name of that part...because there is no schematics to that board and that fume came probably from that part that is red marked on picture....probably mosfets near that coil are also damaged.

HELA15_N18E_130W_MB - the board name

Thank You for Your precious help

[Stevedb]

Re: Dead Dell G7 17 7700 - burned mosfets and please help me: What is that part ?

Does the power lights of charger goes out? What is wrotten on the mosfet. I think they will not be schematics available for this board. That is mosfet low and high and controller in one pakket . Is it maybe ncp 303150?

[madfreak]

Re: Dead Dell G7 17 7700 - burned mosfets and please help me: What is that part ?

Hi, i do not know what that "grey" part is exactly ( R152017H ) because after searching google i have found nothing on that search term R152017H.

The mosfets there are exactly :

NCP303150D ( GPU )

NCP302045 ( CPU )

...what i do not know is what is R152017H and maybe what replacement part can be used there because the smoke came from that grey square element circled in red.

[Stevedb]

Re: Dead Dell G7 17 7700 - burned mosfets and please help me: What is that part ?

Hi yes that is coil probably is it fine you can get your multimeter if it beeps it is just fine , coil is just a wire. Probably it is 15ohm . How much resistance do you have from ground to current resistor. And from current resistor till the gpu. I think if you are lucky like me i had del g7 7790 which also had a dead 'ncp301550 by replacing the board came alife but i can not test it because myscreen is broken i bought this laptop defect. And hdmi will not give screen. I see a little screen, but can not configure the bios to install windows i have no ssd.

[madfreak]

Re: Dead Dell G7 17 7700 - burned mosfets and please help me: What is that part ?

Hi, tomorrow /day after tomorrow those parts will arrive into my apartment so i will be able to finish repairing my laptop , and if You will be able to help me with the measurments, because i got also a short near the M2 SSD slots which is strange

I hope i did not burnt the CPU

[Stevedb]

Re: Dead Dell G7 17 7700 - burned mosfets and please help me: What is that part ?

Hi what is the exact resistance there, where did you measure it?

[madfreak]

Re: Dead Dell G7 17 7700 - burned mosfets and please help me: What is that part ?

Everything is working perfectly fine afer mosfet-s replacement and few capacitors. Weeee... i am realy happy because it is good machine Thank You all for help and have a great weekend

[Stevedb]

Re: Dead Dell G7 17 7700 - burned mosfets and please help me: What is that part ?

No problem i am happy i could help you. Enjoy your laptop.

Regards
Steve