Is it possible to fix a corrupted flash? Error (209025): Can't recognize silicon ID for device

Now I am waiting for the replacement flash memory chip to arrive. I did my research on replacing only the FPGA chip. I only found those at Mouser and DigiKey but the minimum amount is 40 at a unit price of 650 USD, so buying new devboard turns out way cheaper. I tested some of the FPGA pins. Both 7 segment displays dont work(I desoldered those and measured the voltages on the intended inputs on the PCB, I saw some random voltages like 1V, 1.5V 1.6V etc.) Also none of the four indicator leds works. I get constant 1.4V drop across those no mater the programmed pin state. LED0 is damaged itself (shows 0.078V drop across it on diode test mode.) But I measured every single one of the 2x20 GPIO connector pins with a 1 second led blink program. Surprisingly, every single pin in those connectors works normally. I am now trying to test if the PCIe will work, but since its my first time with it, it might take me a while to do it. For now thats all the information I can provide. Thank you for your help once again.