SG135 C2000 BUG

Hello, 

i found this 150 Ohm Resistor in a refurbished SG125.

;)

With that Fix i brought my broken SG125 back to Life 

Cheers 

Daniel 

Confirm! Work on a bricked SG135 Rev.2! Used a 250 Ohm, now it is back to life!

Thanks for sharing guys! Great job!

Hi Robert,

removing the battery doesn't help in that case. 

Regarding asg filke in /etc: I've also read about it and that why this was also my first thought. But if you have an empty disk there is no file available to check.

Instead from what I've seen during installation there is some hw-detect script checking DMI data. It looks like it compares it to a predefined list and if a specific amount of matching data is found it accepts it as an appliance. Again this is not sure, but after checking the logfiles of the installer and digging in the filesystem of the ISO this is what I expect.

Thank and regards,

Paul 

Hey Paul,

can you issue the command biosdecode instead of dmidecode once? Just to verify it can read the bios informations. I have checked my BIOS today in the morning on my SG125, unfortunately it doesnt show any hints regarding Fan Speed or CPU Temp. BUT, you can try to reset all BIOS settings once you get into the BIOS (DEL or ESC works), it may bring back the dmi data. Will check it further today once i get home. I also digged around, couldnt find any information how to write date into dmi. However, ill try to assist as much as you guys need since i can dig around on my hardware now.

Just for all others here to know, 150 Ohm resistor worked well for my SG125 and its back to life, thanks to you guys and your awesome findings. In the morning i started to clone the drive as the old one has some klicking now and then. Once this is done i can offer some assistance for the linux part

Any one mind sharing what size resistor they used? I'm going to order a 150ohm, but dont know what size would work best. 0805?

Hi,

0805 works good,  1206 is WAY to big....  but keep in mind that you have to be extremely careful to solder it in, since it dos not fit very well and the solder paste does not hold the resistor very well in place. 

I think my reboot problem caused by left flux and maybe single solder paste partikles, which could not be seen with bare eye.... after again cleaning all leftovers thouroughly my box reboots again just, fine, I think....

Cheers,

Harald

P.S.: Don't even think about using a trough-hole resistor.... the PCB of the device is so bad quality , you will imediatly lift the soldering pads up and destroy the board, even if you a careful. seldomly seen such a bad PCB....

Hi i soldered the resistor in and it works perfectly, bringing my SG135 back to life. I used the 0603 because i found the 08 bit to big to fit the gap nicely. 

The only funny thing i saw afterwards is the Hardware site on the Bios Displays bullshit. Voltages are Doubled and so on. Can anybody confirm or does my box have any other issue? 

This is because of the DMI Data which is fetched, but due to the pull up resistor now calculated wrong. Due to this, it is impossible to use the SG125/135 as a hardaware appliance anymore.

So as stated before (page 3 last reply) already, the resistor fix is not a fix, it is just a workaound to bring the device back up to life.

For Synology there were 100 ohm resistors used, im not experienced but myabe a shot worth for someone ... se if the device boots and DMI Data is correct

Okay Perfect. 

I can totally live with the fact that its only working for home use. 

Ive got a refubished SG125 from Sophos with a 150 Ohm Resistor soldert an it works well as a Hardware UTM.

A Harddisk change can also be an Reason for the Hardware UTM Installer denie the Installation

Oh well, can you do me some favour and check the Bios values for the rpm spins on the fan and maybe the temperature values? In fact i have replaced the hdd, as the original hdd does have some bad sectors. I did clone the hdd before the change using dd in linux but as far as i know there is some branding inside the sophos hdd's. So this might be really the culprit here.

Hi,

Thanks for the info! it works like a charm. No weird bios messages or wrong values and still recognised as a hardware appliance.

I used a 150 ohm resistor 0805 SMD. very difficult solder joints and very small parts. The solder joints are indeed of poor quality just be careful.

I have also used a solder iron with a very small tip en not too hot, no solder paste just the smallest diameter tin.

Good luck!

Hi,

Thanks for the info! it works like a charm. No weird bios messages or wrong values and still recognised as a hardware appliance.

I used a 150 ohm resistor 0805 SMD. very difficult solder joints and very small parts. The solder joints are indeed of poor quality just be careful.

I have also used a solder iron with a very small tip en not too hot, no solder paste just the smallest diameter tin.

Good luck!