Answer to "Burnt PCB component on desktop LED-lamp, repairable or not?"did you ever fix it? I can’t quite find the chip either: http://how-to.wikia.com/wiki/How_to_identify_comput... but using your 3404 clue, i’d agree that it’s probably a dc/dc step-down from Analog or TI: http://www.analog.com/media/en/technical-documentation/data-sheets/3404fb.pdf http://www.ti.com/general/docs/lit/getli...-null-null-dscatalog-df-pf-null-wwe
Answer to "led light blinking red; error code 3006 ADF lamp error"if you still have the scanner, then it sounds like sensor flag is stuck: https://support.hp.com/lv-en/product/hp-scanjet-pro-3000-s2-sheet-feed-scanner/5363482/document/c04409493 https://h30434.www3.hp.com/t5/Printers-Archive-Read-Only/hp-scanjet-pro-3000-s2-blinking-red-light/td-p/4226158
Answer to "The big mesh in the front not working"I just carefully removed both meshes altogether - sounds great again. Yeah, eventually the stuff will cover the diaphragm itself, but for now it's amazing!