I was changing capacitors in an issue 3 Sinclair RAM pack and had a clumsy moment. Basically I knocked a resistor and there was a small crunching sound and it broke. In my defence the board is more compact and closely placed than the issue 1!
Do these things get brittle with age?
Any idea how I go about identifying said resistor and replacing it - assuming it is possible with something so small...
That there is a diode. It will have the designation 1N41xx where the xx is not visible in the photo. Let us know the full number, I'm sure someone will have one or 2 in their bits boxes.
Luckily there was more than just one photo.
It shows it's a 1N4148 which is a "standard" Diode. Whenever someone speaks about a diode and no other specification we have a 1N4148 in mind. You should easily replace these.
Just make shure the ring (black ring in your photo) is going to the same side because it shows in which direction the electrons are allowed to flow (rectifier).
Never had one broken. Better replace them all when they are such brittle.
Kind regards Paul
In theory, there is no difference between theory and practice. But, in practice, there is.
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
Standby alert 
