MVS MV-2F Palette ram error

[paoloMVS]

Hi guys... I have an MV-2F with a Palette ram error
I have used the Neo-Diagnostic bios and the error is

PALETTE BANKO DATA (0000)
ADDRESS: 401EA6
ACTUAL 8080
EXPECTED 0000

PALETTE BANKO DATA (0000)
ADDRESS: 401E44
ACTUAL 0200
EXPECTED 0000

any time I make a reboot the error code change

all connections are good and try to change:

- the 2 rams with know goods nothing changed
- the two LS (05 and 06)
- the NEO C1
- the NEO GO

any suggestion
Thanks

[paoloMVS]

ah... I forgott .. also the two LS 273 still the same