Hi guys,

My printer needed a service and since it was out of warranty and 6 years old, I decided to take the matter into my own hands. Now, I disassembled every single piece on that machine, cleaned it, lubed the necessary parts and assembled very carefully step by step. And before inserting the final chassis screws decided to test the printer first, all went well and the prints were coming out really smooth. 

But then I remembered forgot to lube the rails of the printhead so did that and then again connected the ribbon cables of the scanner and the control panel to the mobo, screwed all the things together and powered it on and now am seeing all my control panel LEDS lit up, flickering as it was some sort of power issue and then went off, this happend whenever turn on my printer. What could have gone wrong? My 2 days worth of hard work will go to waste if I am unable to make it work again :(

Being a mechanical engineer, I can guarantee that nothing is wrong from the mechanical end which includes the assembly of electronics parts as well. I have basic knowledge of electronics but don't know how to check the motherboard if there is a power issue. I will really appreciate it if anyone can guide me troubleshooting this issue.

My printer is failing to boot after complete disassembly and assembly. (HP inktank 419)