MikroTik RBSXTG-5HPnD Series

If Power_IN Failed
1. No power on 10-28V input
Routerboard does not power on 7
Check for 10-28V output
on C27
Try to use different
PSU adapter
Problem solved
Measure if there is no short
between GND and C27 “+” pin
Change C27, C428
Measure Voltage
on Q1 pin 1-3
Change Q1
Check if ferrite bead FB1 is OK
Change FB1
Measure Voltage drop
over D3 and D4
Check Voltage on D404
and D405 at TRF401 side
Change D3 and D4
Change Q2
Change D404
and D405
Change TRF401
OK
Not OK
Short
No short
0V10-28V
OK
Not OK
0.7V> 0.7V
0V10-28V