I have an old SXT 5HnD which has served me well over the years
Lately when I plug in the PoE, it's hit-or-miss whether the device boots up
Symptoms:
1) The single initial "beep" doesn't always sound
2) Only LD1600 LED illuminates. On a good boot, the LD600 LED will also glow while the device beeps.
Unplugging and replugging the PoE cable can sort out the problem, after which the device will run normally again
I've tried different PoE voltages and cables.
I also tried a full netinstall, and forcing backup booter, but it doesn't change the issue
The problem seems to be with a component on the PCB ... ?
Device has a history of being on a tower where lightning damage / ESD was a common occurrence, however there are no signs of lightning damage and once it manages to boot everything runs normally.
I removed the PCB from the SXT enclosure and can't see any visible signs of liquid damage, although the enclosure is yellowed and the plastic aged/brittle (I'm looking to replace the enclosure too)
I'd like to try repair the device to make it boot up reliably again. Anyone with Mikrotik & Electronics knowledge maybe know what I should look out for ?
Edit: Could this be the problem? Is this a normal system voltage for SXT powered by 12v PoE ?
Code: Select all
[admin@MikroTik] > /system/health/print
Columns: NAME, VALUE, TYPE
# NAME VALUE TYPE
0 voltage 9.6 V
1 temperature 29 C
[admin@MikroTik] >
Code: Select all
[admin@MikroTik] > /system/health/print
Columns: NAME, VALUE, TYPE
# NAME VALUE TYPE
0 voltage 19.4 V
1 temperature 30 C
[admin@MikroTik] >