So i've got an 820-00165 board in at present - was water damaged and repaired backlight circuitry in the past but it's been returned with an issue of running very slow.
The system works perfectly when I use an external USB hard drive loaded with Catalina - no slowdowns or freezes at all fans run normally etc. The issue comes when running off the internal SSD - I initially thought it was an issue with the customers install so have reinstalled it with a fresh copy of Catalina but still the performance issues persist. It runs slowly - freezing, beachball appearing just generally a very laggy experience.
Now given I do not presently have another SSD which is working and compatible with this system I cannot currently try that - I have ordered one to see if this is a simple case of a dodgy SSD which i'm thinking is probably the most likely issue but I would like to ask everyone here if there's anything on the board I might want to check which would cause only the internal SSD to run badly but wouldn't affect the external drive?
The system works perfectly when I use an external USB hard drive loaded with Catalina - no slowdowns or freezes at all fans run normally etc. The issue comes when running off the internal SSD - I initially thought it was an issue with the customers install so have reinstalled it with a fresh copy of Catalina but still the performance issues persist. It runs slowly - freezing, beachball appearing just generally a very laggy experience.
Now given I do not presently have another SSD which is working and compatible with this system I cannot currently try that - I have ordered one to see if this is a simple case of a dodgy SSD which i'm thinking is probably the most likely issue but I would like to ask everyone here if there's anything on the board I might want to check which would cause only the internal SSD to run badly but wouldn't affect the external drive?
