The front panel keypad RGB leds of a rto1000 scope are beginning to fail in quick succession. one or more of the colors are developing intermittent failures. For example, if the green die stops, a yellow button appears red. I pulled the board out and probed around with a dmm in diode mode (compliance voltage is enough to bias the blue die) and confirmed the fault. the issue seems to be lifted bonds; pushing the led "lens" gently temporarily restores operation.
The leds are in a roughly 3x3mm six lead package. On the board they are wired in common anode configuration.
The problem is that i cannot find a suitable replacement that matches the pinout of the original parts. There are many rgb leds in a similar package but they all have anodes and cathodes on either side of the package in what looks like a standard configuration. This is not the case for the original leds.
I procured generic rgb leds of similar size and carefully implanted some on the original footprints under some of the failing buttons with very thin and short jumper wires from the led pins (which i lifted up and trimmed so they don't touch the pads on the board) to the corresponding pad on the board. Needless to say, the process is painstakingly irksome and next to impossible for leds near the encoders, so after replacing a few (ch1 and run/stop) i gave up. The new parts work fine with a slight offset of colors to the cold side.
Has anyone had bad leds on this thing or got an idea what will fit without bodge wires?