My 3B+ suddenly stopped working yesterday. When I power it on I get two solid leds and they just stay on forever without blinking or anything. I checked the sticky thread but it didn't seem to cover the case where the act led doesn't blink at all. I guess it means the pi can't read from the micro sd card so I tried another card with a fresh copy of the latest raspbian but it still didn't work. I checked the voltage on the 5v and the 3.3v pins and they all read correctly unlike in some cases where the 3.3v rail is fried.
I have no idea what happened to my pi. I preordered a new pi 4b but it won't arrive any time soon.
Please help! I don't want to give up if there's still one thing I can do to fix my pi.