I was trying to get Openwrt support working on a TP-Link Festa F61 access point and wrote the image to the wrong off-set. Didn't realize until I restarted and was getting this on boot:
U-Boot SPL 2018.09 (Jun 23 2023 - 11:14:20 +0800) Trying to boot from NOR Error: LZMA uncompression error: 1 Trying to boot from UART Failed to load U-Boot image! Entering emergency mode. Please transmit a valid U-Boot image through this serial console. The U-Boot image will be booted up directly, and not be written to flash. Accepted mode is Ymoden-1K. I built a new u-boot image from source for the mt7621, but can't get past this: Starting ymodem transfer. Press Ctrl+C to cancel. Transferring u-boot-mt7621.bin... 100% 257 KB 8 KB/sec 00:00:31 1 Errors (SOH)/258(STX)/0(CAN) packets, 5 retries Loaded 263882 bytes MT7621 stage1 code Dec 16 2019 17:45:55 (ASIC) CPU=500000000 HZ BUS=166666666 HZ Change MPLL source from XTAL to CR... do MEMPLL setting.. MEMPLL Config : 0x11000000 3PLL mode + External loopback === XTAL-40Mhz === DDR-1200Mhz === Any help would be greatly appreciated. TIA