My raspberry pi 3 B won't boot. The ACT led blinks 3 times, then it blinks once longer than before, then repeats.
No signal on 7" touch display, no signal at HDMI, config.txt hasn't been messed with.
tried 2 SD cards. one was the original, just cleared and rewritten, the other was a brand-new card with a brand-new image.
All of the voltages are fine.
Already tried following "Boot Problems STICKY" on raspberry pi's forum and "Green led blinks 4 times, did I brick my pi?" on stackexchange.
I didn't find anything helpful, other that they were similar problems to mine.
Voltages: fine (3.3 GPIO pin and 5v GPIO pin)
ACT led: 3 short, 1 long, repeat
other forum posts: similar, but NOT helpful
config.txt: not messed with
OS: started blitzing on Raspbian, tried again with Raspbian, then tried Ubuntu.
displays: NO signal
cards: Sandisk (16gb, 32gb extreme)
do I need to buy a new board? I beat my warranty from Vilros by a half year.
UPDATE: I have tried NOOBS lite and NOOBS as well
UPDATE: RaspberryPi Imager was used to flash sd cards