Siara
Posts: 4
Joined: Fri Sep 24, 2021 1:04 pm

CM4 extension board - stopped working after disk connection

Fri Sep 24, 2021 1:12 pm

Hello,

Ive bought recently CM4 extension board, and after I've tried to connect an external 3.5HDD it stopped working. I've tried to energize the HDD through J20 Ext PSU. The board was energized through 12V barrel socket. Now it looks like board is dead, no diodes blinking if I energize it. Can anyone help me if I can bring it back to life?

aBUGSworstnightmare
Posts: 3887
Joined: Tue Jun 30, 2015 1:35 pm

Re: CM4 extension board - stopped working after disk connection

Sat Sep 25, 2021 5:59 am

Disconnect all external devices and check the IOboard voltages, i.e. Verify for 12V PSU is not blown, measure 3.3V/5V on the GPIO connector. You can also measure voltages on J20; inner two pins are GND, outer are 5V and 12V (https://en.m.wikipedia.org/wiki/Berg_connector)

Siara
Posts: 4
Joined: Fri Sep 24, 2021 1:04 pm

Re: CM4 extension board - stopped working after disk connection

Mon Sep 27, 2021 7:58 am

My power supply works fine. It gives me 12.4V

Measured at Ext PSU J20 voltages are: 12.4V, and 5.18V
Measured at GPIO hat connector (J8) voltages are:
- pins 1 and 39 (3.3V), measured 4.6V,
- pins 2 and 39 (5V), measured 5.18V.

Isn't a bit to high? Could CM4 be damaged by this?

aBUGSworstnightmare
Posts: 3887
Joined: Tue Jun 30, 2015 1:35 pm

Re: CM4 extension board - stopped working after disk connection

Mon Sep 27, 2021 8:46 am

Siara wrote:
Mon Sep 27, 2021 7:58 am
My power supply works fine. It gives me 12.4V

Measured at Ext PSU J20 voltages are: 12.4V, and 5.18V
Measured at GPIO hat connector (J8) voltages are:
- pins 1 and 39 (3.3V), measured 4.6V,
- pins 2 and 39 (5V), measured 5.18V.

Isn't a bit to high? Could CM4 be damaged by this?
3.3V is completely out of spec -> that one seems to be toast.
What else - other than the drive - was connected?

Siara
Posts: 4
Joined: Fri Sep 24, 2021 1:04 pm

Re: CM4 extension board - stopped working after disk connection

Mon Sep 27, 2021 8:58 am

By toast you mean most likely CM4 is toasted or just voltage 5->3.3 dice? Currently nothing else except CM4 is plugged in. Is it possible to replace a dice on CM4 to fix it?

Previously I've plugged sata controller into pcie, then I've tried to power up 3.5'' hdd from the J20. For this setup it didnt started up and stayed dead. Isn't J20 for this purpose to energize external hardware like hdd?

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thagrol
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Re: CM4 extension board - stopped working after disk connection

Mon Sep 27, 2021 6:03 pm

Siara wrote:
Mon Sep 27, 2021 8:58 am
By toast you mean most likely CM4 is toasted or just voltage 5->3.3 dice? Currently nothing else except CM4 is plugged in. Is it possible to replace a dice on CM4 to fix it?

Previously I've plugged sata controller into pcie, then I've tried to power up 3.5'' hdd from the J20. For this setup it didnt started up and stayed dead. Isn't J20 for this purpose to energize external hardware like hdd?
Are your sure the wiring for the J20 to SATA power cable was correct?
I'm a volunteer. Take me for granted or abuse my support and I will walk away

All advice given is based on my experience. it worked for me, it may not work for you.
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Siara
Posts: 4
Joined: Fri Sep 24, 2021 1:04 pm

Re: CM4 extension board - stopped working after disk connection

Tue Sep 28, 2021 9:20 am

I've used connector from my ATX power supply, so I'm pretty sure the wiring was correct, as I didnt need to match any wires by myself. It has this smaller 4pinn connector that match J20 and sata power supply on the other end. HDD was spinning.

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