I got a HP141T with 8554B and 8552B plugins.

After replacing some transistors and fuses in the powersupply, I decided on
a careful power up with a Variac

There is some light on the CRT and a horizontal sweep at the top of the
screen (I suppose the picture is out of alignment because of the incorrect
voltages)

It turns out that the ribbon cable to the CRT anode and storage electrodes
is split open and arching between 2 wires, even without the full mains power
applied.

Any suggestings on:

Where to get a new cable?
How to repair them?
How to remove the CRT, as this is not mentioned in the service manual I
downloaded from BAMA.

Thanks in advance, Wim