welcome all,
i need to netinstall rb 750gl
but not successed
using different version of netinsall as 4.9 - 4.17 - 5.17
holding reset button and power on , until second led be off
no result on netinsall
and using port 1.2.3.4.5… and also no result
in same case . i using same conditions to netinstall rbsxt and method success wiht me
how i netinstall rb 750gl ??
thanks all 
Make sure you have the netinstall program running on your PC, that the mikrotik is plugged into the PC WITH PORT 1 and that you have ENABLED netinstall booting in the netinstall program WITH AN UNUSED IP address within your network.
Then, hold the reset button while you plug it in. continue holding. the light will be solid, then flash for awhile, then go off. When it goes off, release the button. Now, on your computer, it should show the device.
I’ve done this many times. If it doesn’t work, then you have an incorrect setting on your PC, or your PC security software is blocking it.
thanks for ur replay
i make netinsatall for rb433- rb493g-rbsxt
i do it more times
but in rb750gl not correct with me
i really apply ur replay and way very carefully . but no thing appear in netinstall
as i have to infected pieces with me which i practise on its..
make sure you have connected Ether1 port of the device, directly to the PC with netinstall, and that the PC has all firewall/antivirus services off. Turn off the RB750GL, hold the button, keep holding the button and turn on the device, keep holding the button for 25 seconds, then release it.
… and remember to setup a static IP on the PC
Hi, make sure that pc and rb750 connected to the same switch and in the same subnet. like pc 192.168.88.3 & netbooting-client ip add 192.168.88.1 or any thing else.and after the light wait about 5 sec. thats it.
and also make sure you run the program as administrator, at least in win8 netboot only in admin mode works