Help in identifying a component - HP 15-cs3009na DAG7BLMB8D0

[Rickkap]

A shop changed the fan on the above and it stopped booting so they sent it to me. All I get is 5 long 3 short flashes on the CAPS lock. I tried flashing the bios and EC chip still the same and then i noticed 3 components missing (2 x resistors and a capacitor) from near to the fan connector.

I've checked and there is not schematics available for this model, so I need help in finding out what the values are of the 2 resistors are, I'm not that bothered about the capacitor. I know that's going to be very difficult unless someone has a donor/working motherboard so i thought i would try and work it out from the main chip which the are connected to.

The marking on the main chip is 5V=7K and under this is L97

Any help would be much appreciated

[mon2]

Richtek RT3612EBGQW

Datasheet:


https://www.google.com/search?sca_es...&bih=915&dpr=1


https://www.aliexpress.com/w/wholesa....home.search.0

[Rickkap]

Mon2 thank you so much. So i've had a look at the datasheet and the resistors that are missing are from pin 4,5 VDIO, VCLK to the CPU.

Still not sure what the values of them would be.

Anyone would like to have a guess or do i just put 0hms in there.

[R_J]

Here is a schematic for an Acer aspire that also uses that RT3612EBGQW ic Page 88

[Rickkap]

Thank you... Looks like i need a 45.3_0402_1% and 100_0402_1%

Where the hell am i going find a 45.3!!!!

Thanks again both of you for your help... time to raid the donor boxes and get probing

[mon2]

https://www.digikey.com/en/products/...KF45R3X/192366

https://www.digikey.com/en/products/...07100RL/726527

[Rickkap]

https://www.digikey.com/en/products/...KF45R3X/192366

https://www.digikey.com/en/products/...07100RL/726527

Thanks Mon2

I found them both on a Dell donor board... both swopped and we have a working HP laptop again.