• Flytech PB-FT4550 MBE-01/AN-FT4550 MBE-00

• DALLAS RTC coin cell empty

The motherboard's Real-Time Clock (RTC) chip contains a coin cell that may have drained, causing the loss of CMOS settings. This can result in an inability to save settings, causing system instability or failure to boot. To fix this, the RTC chip can be replaced with an equivalent or repaired by cutting into it and soldering on a new external coin cell holder. Replacement guides are available at https://github.com/necroware/nwX287 or https://github.com/necroware/nw12887, depending on the actual chip used.

• Expansion slots are on proprietary riser

The listed slots are on the riser card that came with the motherboard.
If you have this board make sure you have the riser for it.

Riser board markings: PB-FT4000 ASK-00 AN-FT4000 ASK-00 4K-240I-2ISA-SLOT CARD MADE IN TAIWAN KCM1 94V-0