PCB layers

[ramondo]

Is there any reliable way to determine the number of layers on a PCB??

[Heihachi_73]

Re: PCB layers

Not always, but some PCBs actually do have the layer numbers stamped on the board on each layer.

[srhofmann]

Re: PCB layers

Diamond saw and jewelers loupe is the most reliable way. As an alternative you can drill out a through hole via, something on the corner of the board that a mounting screw would go through, and then count the layers inside the hole.