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HELP - recovery issues. Unable to flash any ROMs

Months ago I flashed a Modaco custom ROM to my friend's San Francisco. There haven't been any problems of late, however today I attempted to flash a Froyo build so he can try out C2DM apps like Beejive and Facebook and I was unable to load up a recovery screen. When holding Vol DOWN and booting I just got a white rectangle with FTM inside it - indicating that there was no recovery image installed.
I tried flashing Clockwork Recovery with the ZTE Blade Recovery Manager 2.9 but it kept saying 'Unrecognised' after selecting the .img file, no matter which one I used or whether I changed the name or screamed 'hail Mary'. I attempted multiple reinstalls to no avail.
The device is rooted so I tried using Terminal from the Android Market and flashing the recovery image but although it didn't come up with any errors I was still unable to boot into the recovery image. All it does now is show a green android the same as it would if pressing VOL UP when booting.
I've even tried installing with fastboot for mac, but despite being able to input the necessary commands, fastboot doesn't flash the device and just sticks at 'waiting for device' when the recovery flash command is executed. I've tried connecting the device a number of times, rebooting etc. I have no other USB ports available and no access to a Windows pc at present.
Can anyone assist here? The phone still works fine with the Modaco ROM but it's a bit annoying if that's all he will ever be able to use now!
Thanks in advance.

Japanese_Jellyfish_RLS9_image.zip should be easy, and it installs recovery as well. Please read how to install it.

Possibly bricked shield?

I installed the 3.0 update and it never removed TWRP, however TWRP is not working. If I flash the zip file for 3.0 it reboots the system in the middle of installing. I tried flashing the cm12 and cm13 zip files and they say they flashed successful but nothing appears to have installed, and I currently have no rom or firmware installed and can't seem to boot to fastboot. Any ideas?
Here is what happens when i flash the 3.0 zip file. https://youtu.be/-ZVnaNdn6-M

I seen the same logo don't know what to do as well. My parent click update while i was away from home when i got back it just the logo with nvidia.

Restore using the recovery images here for your device https://developer.nvidia.com/gameworksdownload using fastboot not twrp.
The way I get to bootloader is pull the power cable, plug back in and hold power immediately until the menu appears YOU MUST HAVE micro usb connected to a pc while doing this.

I'll give it a try. Thank you for the reply

Try this:
http://forum.xda-developers.com/shield-tv/general/guide-how-to-flash-recovery-image-t3321404

*Help* Phone keeps on booting into TWRP and then doesn't respond.

I just flashed TWRP for the first time but it comes up with "Unmodified System Partition" but touchscreen doesn't work for some reason so I cant select anything. I tried removing the battery and rebooting my phone (Galaxy S4 19505) But it just boots back into recovery for TWRP in the "Unmodified System Partition" . Please Help, thanks.
Edit: Should I delete the TWRP disk image from my pc? (My phone also keeps vibrating while turned off). I have also noticed that there is a non physical home back and menue button, did I download the wrong version? I used the TWRP app to download and flash the image.

Hi,
Download the latest image or tar from here: https://dl.twrp.me/jfltexx/ and flash it with either Odin or Heimdall.
Not quite sure about the notice, is it on the screen that asks you if you want to keep the system partition read-only? Then you either need to swipe or click ok.
Normally flashing a recovery should not produce the problems you are describing, did you only flash the recovery?

flash recovery from booted android?

hi,
i have an old S4 which I wanted to update to new LineageOS. First I tried to flash TWRP by JCDteam, but I got error, and now recovery does not boot - it simply restarts the phone. The problem is, that the USB port is dead on the phone (shows Device has malfuncationed when connecting to PC), so I cannot use Odin to flash new recovery. Is there any way to flash TWRP to Recovery partition from the phone itself (it boots and works fine and has root)?

Try to use genuine cable first not some Chinese fake things.
Plenty of apps available to flash recovery, try to install twrp app

I think I've bricked. it. I've tried to do dd from terminal but when I rebooted, the recovery still doesn't boot (starts booting then reboots), the phone doesn't boot anymore (stuck on LineageOS logo), and if I boot to download mode and connect usb cable (and i've tried tons of them) it just says unknown device
Anything else I can do?

mrQQ said:
Anything else I can do?
Click to expand...
Click to collapse
Replace the USB port so you can flash a system image through Ofin. If I recall correctly the port is on its own board, so if replacing the port isn't feasible, replacing the board the port is on with one from a different S4 should work. Of course only you can determine whether doing so is worth the time and energy.

When flashing TWRP it goes back to bootloader downloading and I can't do anything until i flash original firmware again.

Hey! I guess you can see from the title that I am a toootal noob in terms of custom recoveryes, roms and rooting, but I was trying to flash pixel experience on the phone, because my warranty recently expired and wanted to try it out. So I searched and I found to flash a rom on any phone I need a custom recovery and found that TWRP is the most popular and supported the phone so I installed odin and the samsung usb drivers, turned on bootloader and usb debugging in the developer settings, booted into the bootloader, connected the phone to my pc and used odin(tried by running it with and without adminstrator) to flash the tar file, with auto reboot turned off, it says it's installed succesfully, but when I hold the power and volume down button to exit bootloader and hold the power and volume up button to boot into recovery mode , instead of showing the phone model and then powered by <whatever it is> it shows me the phone model and under it it says that i have an unofficial OS that may harm my phone or something like that and sends me back to bootloader this time with "<!>" in the upper left corner and something about vbmeta. If I understand it right vbmeta is verified boot which as the name suggest makes the phone boot into the official os and you turn it off when you turn on bootloader. The only way to get out of that is to flash the official firmware again. I would really appreciate it if someone helps me with this. If not I guess I will try to flash Orange Fox recovery.

Try flashing this first, then TWRP