On Thu, 3 Jan 2019 07:32:12 +0100, R.Wieser wrote:

> Thats another problem: I'm rather unsure if finding a similar panel
> means that the signals and/or power on its connector will be the same as
> for mine.

Power is normally easy to trace out. 0V / Ground will probably trace
through to large areas of board -ve sides of electrolytic capacitors
and exposed bits of metal work (disply unit fixing clips?) and around
any fixing holes possibly without the laquer at those places. +V will
connect to muliple active devices and the + side of some
electrolytics the other side of which are connected to the Gnd as
sussed out before. What the supply voltage is is trickier, 3.3, 5,
12?

> I mean that if the other connector uses even a slightly different pin
> layout than I could easily destroy my panel when power is applied to
> data pins or two output pins are connected, or just ignore my attempts
> at feeding it data.

Search for the chip numbers rather than the completed panel number.
Far more likely to get useful hits and datasheet for the chip so its
pin out and expected supply voltage (but note the board might live of
something else, deriving supply(s) for the chip(s) from that with on
board regulators). With the pin out you can then trace back to
connector and the data sheet will tell you what interface it uses,
maybe I2C SPI etc.

--
Cheers
Dave.

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