Quoted from McSquid:
lots of talk about clock boards here, Im still in the parts gathering phase of my massive TZ project. Is there any reason that the original board cannot be modded and have LEDs soldered in to eliminate the heat issues? Is heat the only point of common failure on these boards? I have two original boards and Id rather save money vs buying a new board. I'm no stranger to board repair, but I want to make sure I know the whole story.
The light sockets must be replaced to put LEDs in. Unless you put in something with diffusers or light spreaders... you'll get hot spots in the lighting. Not sure if the half-wave lighting design of the board will lead to LED flicker.. possible.
Second, you'll still be stuck with optos that are NLA and replacements require ugly hacks
Third, you'll still be stuck with the compromise design of the original board that lacks switch isolation for the optos leading to high risk failures and of course the challenges of switch matrix troubleshooting if that becomes an issue.
Where as with the ingo board, all of those things are addressed... you get easily replaced parts, easy lighting options, and new features like the test features.
In the era of paying $40 for a plastic toy... the replacement clock board is the best money you can spend on your TZ fore reliable future operation.