Motherboard code 55

[Iamazn]

I just finished putting everything together and when I turned it on, the LED display on the mobo reads 55. What's wrong?

[AUGieDogie]

On my M5F the manual says code 55 is "no memory installed"

[SoF]

try booting with single channel first, then apply RAM settings, then reboot, check, shut-down and insert the second one.

usually happens with some crappy RAM or if you change from certain IC to IC (e.g. Hynix CFR --> PSC = "55" always...)

Something with the sub-timings on mem-reset imo...

[Iamazn]

Reseating the RAM fixed it.