Tell us about yourself!
I was able to get 27.5 Volts across tubes 1,2, 3, and 5 (4 was removed, as you thought it might be bad). 6 gets zero (but was working before removing 4. Could there be a short?
It is a 4007, and matches the direction in your photos, so I don't think the diode is the problem, but I could be wrong, so here's a photo:
I removed the one with the orange cathode, but now none of the tubes turn on, but it does respond to the remote by beeping, I'm afraid its getting worse
I don't see any short under the partially lit tube or its IC's (I added a photo, maybe I didn't see it it), and the cathode has a slight orange red glow, could the short be inside the tube? I put the IC from the working tubes into the partially lit one, but nothing changed, so I'm not sure where the problem is.
I just finished building the kit, and the first three tubes don't light up at all, the fourth is only partially illuminated in the bottom right corner, but the last two numbers work perfectly, displaying the seconds. Any idea why this would be like that? And yes, the far left LED is out, I haven't soldered it in yet.