Premiere won't playback video on program or source monitor and won't even update the playhead when using version 14.8. It'll either display this light grey box or just the same dark grey as the rest of the UI, but moving the playhead around, pressing start/stop etc does nothing.
I think it may be a unique thing with my graphics card but still, this has never happened in any version before it.
Computer specs: CPU: AMD FX-8350 MOBO: M5A99FX PRO R2.0 GPU: AMD Radeon HD 7800 RAM: 24GB DDR3
If I change the video rendering and playback option from the Mercury PLayback Engine GPU Acceleration (OpenCL) to just software only and restart Premiere, it will play back (but obviously slower and harder to with effects cos it's just using the CPU).
Do not count on Windows to be fully up to date when it comes to device drivers Go to the vendor site to be sure you have an updated driver for your graphic adapter •ATI Driver https://www.amd.com/en/support
There are also intermittent reports that the newest driver is not always the best driver due to driver bugs or compatibility issues, so you MAY need to try an earlier driver version