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Electronics => Repair => Topic started by: crozenfox on August 12, 2024, 09:55:31 pm

Title: [solved] Asus VE276Q monitor with unidentified burnt component
Post by: crozenfox on August 12, 2024, 09:55:31 pm
Hi all,

My monitor no longer works. There is one component that burned.
The monitor is an Asus VE276Q.
Can you identify this component ?
The reference is something like LT2124 631006 if i see it right !

Thanks

(https://i.ibb.co/zRdFYj1/Sans-titre.png) (https://ibb.co/zRdFYj1)

(https://i.ibb.co/djzM3K2/IMG-20240812-173442.jpg) (https://ibb.co/djzM3K2)

(https://i.ibb.co/GpCy5h3/IMG-20240812-173021.jpg) (https://ibb.co/GpCy5h3)
Title: Re: Asus VE276Q monitor with unidentified burnt component
Post by: fzabkar on August 12, 2024, 10:38:09 pm
I'm guessing it's a 100V, 3A Schottky rectifier (B3100B ??).

Similar to ...

https://datasheet.octopart.com/B3100-13-F-Diodes-Inc.-datasheet-7554362.pdf (https://datasheet.octopart.com/B3100-13-F-Diodes-Inc.-datasheet-7554362.pdf)
https://www.onsemi.com/pdf/datasheet/mbrs3100t3-d.pdf (https://www.onsemi.com/pdf/datasheet/mbrs3100t3-d.pdf)

Page 14 of the datasheet for the MP3389 shows a B180 diode:

https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP3389/document_id/1533/ (https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP3389/document_id/1533/)
Title: Re: Asus VE276Q monitor with unidentified burnt component
Post by: crozenfox on August 13, 2024, 11:02:50 am
Thank you very much. You are great !  :-+

I found two components :
One is a SMC case with a 200pF capacitance while the other one is a SMB with 105pF capacitance.
Here are the links :
https://www.tme.eu/be/en/details/b3100-13-f/smd-schottky-diodes/diodes-incorporated/ (https://www.tme.eu/be/en/details/b3100-13-f/smd-schottky-diodes/diodes-incorporated/)
https://www.tme.eu/be/en/details/b3100be-13/smd-schottky-diodes/diodes-incorporated/ (https://www.tme.eu/be/en/details/b3100be-13/smd-schottky-diodes/diodes-incorporated/)

What do you think should i try ?
Title: Re: Asus VE276Q monitor with unidentified burnt component
Post by: fzabkar on August 13, 2024, 11:28:18 am
I would use whichever diode has the correct dimensions. Check the output for short to ground.
Title: Re: Asus VE276Q monitor with unidentified burnt component
Post by: crozenfox on August 13, 2024, 07:12:53 pm
ok
The dimensions are this one. So, i will try with it. Thnx
https://datasheet.octopart.com/B3100-13-F-Diodes-Inc.-datasheet-7554362.pdf
Title: Re: Asus VE276Q monitor with unidentified burnt component
Post by: crozenfox on August 16, 2024, 09:28:50 pm
Job done. Works very well !
Thank you a lot, this forum is great !  :-+