ummm well when i was trying to take off the heatsink... the lever is hard to take off..... using flat screw..... then finally it came off but then the heatsink pops right off too and it was not the intention. intention was gonna take the lever clip off first. so the heatsink pop right off ALONG WITH THE CPU STICKING ON THE HEATSINK!I think you may have damaged your cpu when you used a screwdriver to pry your cpu off the heatsink. Do you see any bent pins? Have you tried a cmos reset? Have you changed any hardware? System specs please.
Did you plug in the 4-pin ATX connector? I don't see that on your checklist, and no display is a sign of missing / loose CPU power connector.
Otherwise, you may have damaged the CPU (I'm saying this as someone who un-bent pins on a socket 478 CPU by attempting to pry it off in the same way you did). It's possible that you stressed some of the metal in the unbent pins too much for there to be a good connection.
Negative. Some boards DO have one built on but a lot do not.i thought the beep sound comes from motherboard? anyway the speaker was already connected. no hear beep.
umm whats the different doing it in the case and outside the case? whats the benefit for outside case?Negative. Some boards DO have one built on but a lot do not.
You need to simply pull the board out of the case and start doing trials.
cpu, ram, power and nothing else outSIDE of the case.