Hello, I recently bought a used SG135 rev.1 which has AVR54 bug (I found out about this bug after I buy it).
For others vendors I found a possible fix, but not for Sophos.
There are two (as far as I know) fixes:
1. Replace a atom c2xxx with C0 revision
2. external pull-up resistor (18.2k to 10k), from LPC_CLKOUT0 or LPC_CLKOUT1, tied to 3.3V
Did someone tried to fix this bug? (I use home license, so I don't have any agreement with Sophos).
Ahoj Robert and welcome to the UTM Community!
I haven't been inside an SG 135, are you telling us that the Atom processor cannot be replaced?
Cheers - Bob
Hello BAlfons, I didn't opened yet, but generally they are soldered to mainboard, so replacement is very, very hard.
I have the same issue. Anyone an Idea where to catch those Pins on the Board?
Do you have any picture of mainboard??? Can you share ???
yes, sure! Here they are (if you need more or more detailed ares let me know):
It would be great if there was a simple pullup to bring it back to life, but without schematics or layouts to hard for me.
I agree with you, without scheme wil be hard.