Hardware HDMI not working, found reason but need help.

[SylvINk]

So, a client brought us his WiiU, the HDMI isn't working, we found, thanks to me bringing mine, that a little component, marked as "CM8" on the board was faulty on the client's side.
Is there any way to know how to find this component other than having to buy a whole other WiiU? I'm patiently awating any answers.
Here is what the component looks like if anyone needs it:

Thank you again.
With kind regards.

 

[SDIO]

CM are common mode chockes to filter out interference. The console would probably work fine if you just bridge over the corresponding pins. I don't have the exact specs for that part.

 

[SylvINk]

Yeah, my boss put a small copper wire between the two leftmost pins (the one side that didn't beep) on my console, which works perfectly, the whole two sides beeped, so we knew it was there specifically. Thanks again.

Post automatically merged: Feb 7, 2025

Update, we tried but it still doesn't work, should we try changing the HDMI port?

Post automatically merged: Feb 8, 2025

CM are common mode chockes to filter out interference. The console would probably work fine if you just bridge over the corresponding pins. I don't have the exact specs for that part.

we put a copper wire to bridge the corresponding pins, but it still won't turn on, maybe it's the HDMI itself having problems? port seems completely fine, nothing looks broken and the souldering was still completely fine when we opened it.

 

[V10lator]

There are reports of CM9 and CM10 getting bridged when they fail but that's apples vs oranges (SATA vs HDMI) I guess. These filters might indeed be important to clear the HDMI signal or something.

Maybe @tqhoang is able to identify replacement parts for CM7 / CM8 ?

Also try with a really good shielded HDMI cable. Just a shoot into the blue but maybe the damaged (and now bridged?) filters clear interference from "bad" cables?

//EDIT:

we put a copper wire to bridge the corresponding pins, but it still won't turn on

You did check it isn't configured to output image over the composite port instead of HDMI, didn't you?

//EDIT²: Here's a report of someone bridging CM7 and CM8 successfully: https://gbatemp.net/threads/absolute-fix-to-160-1400-error.572879/post-10124872
So:
- Make sure display output is set to HDMI and not to composite in Wii Us settings.
- Completely remove CM7 / CM8 from the board and bridge the lines like they did in the linked thread.

//EDIT³: Another successfull CM7 / CM8 bridging report with pictures, hope this helps: https://gbatemp.net/threads/absolute-fix-to-160-1400-error.572879/post-10431203

 

[relaxxx]

If those filters got fried by a power surge / shock there's probably bigger problems. HDMI data lines? The AV port should work if it's just that filter. Sure it's not a bad NAND brick? Mine had no video at all until I RedNAND fixed.

 

[Ysecond]

Sometimes, I use this, 0402 0Ω.

 

[reycr88]

Do i need the capacitor with nand aid?i have 38 gauge wire as well

 

[tqhoang]

There are reports of CM9 and CM10 getting bridged when they fail but that's apples vs oranges (SATA vs HDMI) I guess. These filters might indeed be important to clear the HDMI signal or something.

Maybe @tqhoang is able to identify replacement parts for CM7 / CM8 ?

Also try with a really good shielded HDMI cable. Just a shoot into the blue but maybe the damaged (and now bridged?) filters clear interference from "bad" cables?

//EDIT:

You did check it isn't configured to output image over the composite port instead of HDMI, didn't you?

//EDIT²: Here's a report of someone bridging CM7 and CM8 successfully: https://gbatemp.net/threads/absolute-fix-to-160-1400-error.572879/post-10124872
So:
- Make sure display output is set to HDMI and not to composite in Wii Us settings.
- Completely remove CM7 / CM8 from the board and bridge the lines like they did in the linked thread.

//EDIT³: Another successfull CM7 / CM8 bridging report with pictures, hope this helps: https://gbatemp.net/threads/absolute-fix-to-160-1400-error.572879/post-10431203

For CM7/CM8 that are connected to the HDMI IC, you could probably use one of these Panasonic 0804 CMC.
https://www.mouser.com/ProductDetail/667-EXC-28CG900U