I have some bad experience with tantalum capacitor (tp)on board after leaving it for about a year or two:
1. While I'm trying to revive an old pc board, two of the tps exploded. I thought something wrong with the board.
2. I'm trying another board, samething happened.
3. While I'm trying to power up my home build variable power supply unit that I know it previously working nicely, samething happened.
4. Lastly, also on my home build power amp, something happened.
Any view or reference about the behaviour of tantalum capacitor.
Note: the thing happened only on equipment that you leave it for quite long time
Thanks in advance