Hello,
my RB750UPr2 does not seem to boot anymore. Probably it got broken during some unsuccessful upgrade I tried earlier. After power is applied it lits power led + user led green, also led1-5 are green. Additionally led4 is red. After trying Netboot it is detected, so I choose routeros-mipsbe 6.41 to be installed. It tells me that format is done, then download of routeros is done. Then status is changed to OK and the message says “Installation finished successfully” . But after power cycle it does not boot - it lits all the leds green and additionally led4 red again. Seems like nothing has changed. How should I proceed to make the device functional again?