Pi3b dead?

Hi all thanks in advance for looking at this post and any help you can provide! I have an RPI3b that I've been using as a pihole- booting off an usb drive. I noticed yesterday the pihole was down so I powered off the pi and examined the flash drive it reported that it was in read only mode (there is no hardware switch on this drive) so given past experiences I've come to the conclusion since its not a software lock the flash must be erroring and the drive's controller decided the lock out any writes to preserve the data on the drive. So I thought if I got another new usb drive and flashed it with the official rasberry pi imager I could start again. unfortunately after imaging the new drive the pi will not boot into raspbian it will just sit at blinking cursor on a black screen. I already checked the 3v3 power pin on the gpio and its still reads ~3.3v. I'm a bit mystified as how to proceed any help would be appreciated!

The green LED should blink in a pattern, check that pattern against https://elinux.org/R-Pi_Troubleshooting

Hi <@796000224690307072> the blinking of the green light is continuous so no count to refer to error code. However I found that if I move my logitech usb unifying receiver to the usb port kitty corner to the new flash drive I'm trying to boot off of the pi will boot and make it to the desktop. I'm confused as the power for usb on the rpi 3 is a total of 1200ma and shared across all the ports equally via a shared power rail- why does moving the receiver make a difference?