I have a Very old RB750 (in factory reset state)
Uploaded RouterOS V7.14.2
It does not Offer the update option to V7 after reboot.
.npk file remains in files section as was uploaded.

Factory Firmware: 3.09
Current Firmware: 6.45.7
Update Firmware: 6.45.7

I'm having difficulty finding further information on this.
MikroTik does not seem to have an archived product page that I can find for this old version.
I can find RB750G but not the V1.
Is there a firmware upgrade limitation on this old device?
Thanks!

-Steve

I'm guessing a netinstall would be my next troubleshooting step on this.
And see what happens.
I'm quite new to MikrotiK/RouterOS.
And have never done one of these yet.
So good learning experience.
It's old hardware, testing just for fun.
This is not any kind of service/production unit.
-sg

I'm attempting a netinstall on it.
But ran into another problem and posted a separate topic on this in general.
I'm not sure if linking to that here is acceptable and I am very new on the forum.

Personally I'd upgrade using ROS built-in updater as far as it goes ... and upgrade routerboot as it goes. Running ROS v7 requires routerboot which is not ancient (6.45.7 might be fine, but to be on safe side ...).

Next: if you want to upgrade from v6 to v7 using built-in updater, you have to set channel to "upgrade" ... IIRC it'll revert to "stable" after device successfully upgrades to v7. AFAIK it'll go to 7.12.1 this way and you'll have to ro another upgrade from there (reason is breaking change, introduced in 7.13 ... and only updater in 7.12 can handle it).

Or you can go the netinstall way, but routerboot version (if it's too old) will be showstopper in this case (routetboot isn't upgraded by netinstall, it's upgraded from within ROS to version, shipped with running ROS).

This got resolved.
I had no idea this was a MIPS ARCH and assumed ARM.
Part of the issue is that I was not able to find an archived specs/info page on this older router.
I made an incorrect assumption and was trying to update off of ARM firmware both from Winbox and netinstall.
And of course didn't get any errors, just got "no results" when trying to upgrade.
Thanks for the bootloader pointer.
Everything worked so it's probably "new enough" but I will also go though the process of updating the bootloader.
This is purely educational at this point.
I'm not using the router in any kind of actual production environment or service.

This makes it sound like at a certain point bootloaders are included in the upgrade.
So at some point it is no longer a separate process?
And my bootloader was new enough to handle this maybe.
https://wiki.mikrotik.com/wiki/RouterBO ... er_upgrade

I guess there is also a backup bootloader which runs if you hold the reset button down even longer past the etherboot part.
In case you bork the main bootloader.
Not sure if that's updated at any point as well or just "hardcoded" factory stuff.

Yes this got resolved. 3 posts up but it's a lot of text to read though.
It got I was loading the wrong firmware and assumed it was an ARM CPU when it was MIPS.
Really new to RouterOS myself.
What complicated matters was BOTH that I assumed wrong ARC, and three is no longer a product info page out there for the Original 750 V1
So I did not quickly pick up on this and ran off with a wrong assumption.
I always follow up on and re-check my posts as well just takes me a few days.