E2 Update will update a E2 image if you can not boot into another image as kegnkiwi describes. If that is the case you would usually use a recovery image by un raring your chosen image and placing the dual folder at the root of a fat 32 formatted usb stick.If I do so, there is a flux of "boot, e2upd, update" messages on box's lcd, with no further action. I just want to enter to recovery mode.
OkNo, I don't want to flash a recovery image, I want to enter to recovery menu. If one of the four E2 images fails for some reason, I need to enter to recovery mode to flash a backup image. If I do in your way, I loose every other image installed.
You can also flash the image in slot one from other images, such as pure2.The only way to have the recovery screen back is to flash in slot 1 OpenPLi 8.3 ONLY (not 9.0, not develop build). Then you can upgrade through Flash Online to OpenPLi 9.0 without loosing recovery screen. If you flash any other team's image, recovery gets lost again.
The other way is to press mutliple times the numbers 1 or 2 or 3 or 4 on your remote as mentioned before.