Question 2 broken resistors on Lenovo 90BF002DUK motherboard

JFS2705

Commendable
Aug 1, 2017
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Hi there,
I was removing the CPU cooler on my sisters old Lenovo 90BF002DUK motherboard (FM2+ socket) from a Lenovo h50-55 and i accidentally knocked off 2 resistors by the CPU. I am looking into getting the motherboard repaired but I am being told it will cost £90. I can replace the motherboard for less but i will require a new case because of incompatible pin layouts on the front panel connectors. I was wondering does anyone know if i may be able to get this done cheaper if possible.
View: https://imgur.com/a/QZc4uCQ
 
Hi there,
I was removing the CPU cooler on my sisters old Lenovo 90BF002DUK motherboard (FM2+ socket) from a Lenovo h50-55 and i accidentally knocked off 2 resistors by the CPU. I am looking into getting the motherboard repaired but I am being told it will cost £90. I can replace the motherboard for less but i will require a new case because of incompatible pin layouts on the front panel connectors. I was wondering does anyone know if i may be able to get this done cheaper if possible.
View: https://imgur.com/a/QZc4uCQ
Have you tried operating it yet?

They're not resistors but are capacitors... the RefDes' (C116 & C118) are the clue. Which is lucky since capacitors (like those) are most often used as noise-decoupling. I'd try using the board before committing to replacement or repair. It most likely will operate just fine.
 

JFS2705

Commendable
Aug 1, 2017
26
0
1,530
0
Have you tried operating it yet?

They're not resistors but are capacitors... the RefDes' (C116 & C118) are the clue. Which is lucky since capacitors (like those) are most often used as noise-decoupling. I'd try using the board before committing to replacement or repair. It most likely will operate just fine.
I thought those were resistors and the capacitors. I thought capacitors looked like this.
View: https://imgur.com/a/8rfScUz

and resistors looked like this
View: https://imgur.com/a/SjcEPgr
 
I thought those were resistors and the capacitors. I thought capacitors looked like this.
View: https://imgur.com/a/8rfScUz

and resistors looked like this
View: https://imgur.com/a/SjcEPgr
The second pic are capacitors too :) and again, it's the RefDes' that are the give-away. Those are MLCC cap's (Multi-Layer Ceramic Capacitor) and have different construction and application from the electrolytic caps shown in the first picture.

There are many styles of capacitors with different form factors.
 

JFS2705

Commendable
Aug 1, 2017
26
0
1,530
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The second pic are capacitors too :) and again, it's the RefDes' that are the give-away. Those are MLCC cap's (Multi-Layer Ceramic Capacitor) and have different construction and application from the electrolytic caps shown in the first picture.

There are many styles of capacitors with different form factors.
Ah ok, I did not know that, so do you think it will be ok to leave the motherboard as is and not replace it/repair it?
 
Ah ok, I did not know that, so do you think it will be ok to leave the motherboard as is and not replace it/repair it?
Can't be positive, but I'd definitely give it a try. In that location they look like they're being used to decouple high frequency switching noise from Vcore voltage going to the CPU. They're probably redundant...there are usually a lot of them that designers scatter around on principle. They're cheap, easy to locate in a layout and are better off having too many than too few. So missing a couple probably won't matter.

In fact, if you look about the board you'll probably find more than a few locations where they decided to not install them. That's not uncommon as shaving cost during manufacture is always a way to get a bonus.
 

punkncat

Respectable
I make the following recommend without actually knowing what the landscape is for refurbished office machines in your locale.

It's super easy finding sub $100 SFF office machines like Dell or HP with 2nd or 3rd gen Intel that would absolutely work circles around what that build likely is. I wouldn't repair it, I would replace it, if possible. Something like an OptiPlex.
 

JFS2705

Commendable
Aug 1, 2017
26
0
1,530
0
Can't be positive, but I'd definitely give it a try. In that location they look like they're being used to decouple high frequency switching noise from Vcore voltage going to the CPU. They're probably redundant...there are usually a lot of them that designers scatter around on principle. They're cheap, easy to locate in a layout and are better off having too many than too few. So missing a couple probably won't matter.

In fact, if you look about the board you'll probably find more than a few locations where they decided to not install them. That's not uncommon as shaving cost during manufacture is always a way to get a bonus.
Ok, well after i knocked off the 2 capacitors I tested the PC out and i managed to boot in to windows just fine. I will install the new cooler tomorrow and see if everything works ok. Thanks so much for your help.
 

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