I still know the TY2010 as a thyristor with 200V, 10A and a gate current of <15mA, but I cannot guarantee that the TY2010GH meets these specifications exactly. It should therefore be checked whether the circuit in which it is used expects a thyristor (e.g. as a crowbar to protect the output voltage). The pin assignment in the photo would then be from left to right: cathode - anode - gate.
If this is the case, a TYN610RG can be tried as a substitute (thyristors with less than 600V are hardly common anymore).
As mentioned, everything is at your own risk, as no documentation is available from TY2010. Especially with a power supply unit, you must of course know how to work on it.
Good luck!
Regards
/Peter
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