I've got a touch sensitive table lamp that dims to three different stages (off, low intensity, mid intensity, full intensity). It has stopped working like that and now just being powered to the mains goes to full intensity, ignoring the touches to the base.
Touch plate connection is good, and I've gone checking connections throughout the circuit, and all seems good too.
I ordered a new dimmer IC and replaced the chip, but the circuit behaves the same. The circuit is very very similar to the one described in the IC sheet here http://www.micropik.com/PDF/tt6061a.pdf
I'm more interested in learning how to debug the circuit than the fix itself. Any help on steps to take would be appreciated.