Technical Dash LCD corrupt

[JD2023]

Howdy all
The dash lcd in my daughters fiat500 is corrupt
Seems common enough but i was wondering if MES can read the mileage as the display is now just jibberish
My understanding is that if i buy a replacement it needs to have lower miles

As the car is a uk import in to Ireland the clock is in mph so might as well change it for a kph one ?
Her 500 is a 2015 and i seen a full digital unit from a 2016 so would it wofk or do i need to remove the old one to get part numbers first ?
Any tips / help much appreciated
John

 

[JD2023]

Checked the wiring from the boot lid to see if there were any issues as I had seen a couple of reports of frayed cables affecting the dash
did no see any issues and the brake lights are working ok

Removed and cleaned the earth strap & even though it looked in good condition I added another strap just in case
Checked the display and sometimes it does not have anything at all on it and sometimes it looks like the piccy above
the Battery ( EFB) is the original 10 year old and my analyzer is giving mixed results
Tested as EFB it says it is good but tested as EN it says replace
I removed it and charged it up as the car had not been used in 2 weeks
Still no joy so removed the clock's to check the part number
I was going to just replace the little display as it can be got on ali for around €85 but as I was going to be removing the clocks I thought why not replace with a KPH version instead of the MPH one that is in it as it is an import in to Ireland
I got a full digi screen on ebay and I have bought a Licence for MES and a Vlinker dongle to program it when it arrives hopefully all will work out ok