RB433UAHL is dead

RouterOS General
1

Hi!

I tried to downgrade RB433UAHL with OS 5.12, so I uploaded routeros-mipsbe-4.5.npk file to it and cliked system-downgrade.
after this the RB has no communication. it only beeps once at start and that’s all.
Can I fix it by myself? This board has no serial port only four pads: TX,RX,GND,3.3V - how can I use it to get the console?

2

Likely you would need a TTL converter.
max232

3

I have one.
how should connecting look like?

TTL RB
TX---------RX
RX---------TX
GND--------GND

is it enough? or 3.3V should be also connected?

4

Try NetInstall first:
http://wiki.mikrotik.com/wiki/Netinstall

HTH,

5

dzieki kolego. POMOGLO! :slight_smile: