After finally acquiring another ULA - albeit from a Spectrum +2 - I replaced the one in my 128K, turned on the machine and was greeted with a screen alternating between these two...
![Image](https://i.postimg.cc/Sn7HCZWY/IMG-20230728-115605.jpg)
![Image](https://i.postimg.cc/d75XSLNq/IMG-20230728-115603.jpg)
At first I thought it was a problem with the ULA, so swapped them back, but the problem remained. It therefore seems my 128K has developed this fault during the last few weeks of not being used?!
Any suggestions?