jet set 500 mfp model. issue does not see scanner att all also when i turn on printer lamp scanner does not give any light I have change lamp but same ..I also change flat cable for scanner but no scaner..I cant find any schematic diagram for motherboard ..Maybe is damage something in circuit ..Maybe some information hot to test lamp or where do test point on board?

May be, may be. But what is the model of your device? "Jet 500" is not a model.

HP LaserJet Enterprise 500 MFP M525 moodel

Maybe some schematic?

Здесь все-таки русскоязычный форум. Я могу продолжить на английском, но все-таки предложу перейти на русский. Разница существенная, в том числе и в качестве инфы для топикстартера.

I understand russian but i can t wrrite..

Гугль-транслятор есть.