flashrom listed 1.8V as the next lower voltage so we tried. And, amazingly, it worked - not reliably, but sufficiently
SPI flash chips are amazing. When I had to unbrick my PC’s mainboard (MSI X370 SLI PLUS), I only had wires with 2.54mm connectors, while the header was 2 (?) mm. I could actually plug the wires, but not to two pins side by side. I connected the data pins and voltage (which btw was too high, 3.3V lowered to 2.9V by plugging a 3V3-5V shifter in reverse, while the chip was supposed to run at 1.8V) — but couldn’t connect ground. flashrom recognized the chip when I tried low speed and everything worked :D
SPI flash chips are amazing. When I had to unbrick my PC’s mainboard (MSI X370 SLI PLUS), I only had wires with 2.54mm connectors, while the header was 2 (?) mm. I could actually plug the wires, but not to two pins side by side. I connected the data pins and voltage (which btw was too high, 3.3V lowered to 2.9V by plugging a 3V3-5V shifter in reverse, while the chip was supposed to run at 1.8V) — but couldn’t connect ground. flashrom recognized the chip when I tried low speed and everything worked :D