Quote Originally Posted by massman
1) Yes there is; two identical APW7120 chips

2) At my home forum, which is dutch, Wittekakker also points out the APW7120 chip as Voltage regulator. The other chip should be the LMxxx chip. Can you check that chip out ?
You mean LM358 ? That one is an operational amplifier: COULD be part regulator circuit. However, since there are two 'APW7120 ' regulator chips (+lots of components required for voltage genaration around them, like capacitors MOSFET's and inductors) is it LIKELY those those are used to generate two important DC-voltages.

So, it is good idea to check voltages of those nodes wittekakker pointed out.