rb435g serial console isn't react on input from PC keybord

Hardware MikroTik hardware general
1

Hi,

My rb435g has stopped respond on key pressing in serial console session.
I am using null-modem cable and “baud-rate=115200 data-bits=8 parity=none stop-bits=1 flow-control=none” port settings on RB and PC sides.
Serial connection was working normally for ~1year using described settings. Currently I am seeing only output from router during boot/shut-down, but can’t type anything even in RouterBOOT menu or than in login prompt

I have tried connecting from two different PC using different null modem cables via minicom/putty/gnu-screen, no luck so far
Netinstall with default settings to RouterOS 6.15 and RouterBOOT update to 3.10 isn’t resolve my issue .

Are there any solutions left, or RS232 hw driver/controller is broken?

Any advices/help appreciated.

TIA

2

Use you Linux ore windows machine i think Linux.

3

Hi,
I have fixed this problem via replacing RS232 controller chip SPIEX SP3243 http://www.farnell.com/datasheets/71003.pdf
Most probably it was broken by some ESD on RS232 connector when RB was detached from grounding. As a prevention measure I have set-up additional permanent grounding wire to the RB case.

Solved.

4

Great and thanks for let us now.