Hi I Own An Acer Veriton Desktop CPU. It Has Some White Sticker On Front with NSOD00604200BCA written On it. I Think Its going to help you recognize is. I Was working 3 Days Ago on My Pc It Froze And When i Restarted it, It Didn't Boot Up And Its Blue Light Above Power Button Was On for 3 Seconds and It Went Of But The Light In Powe rd Button Was On. I Had this Same Problem Two Times Ago Too, Once it was fixed By Hard reset(Remove Power cable and hold power button for 30 seconds) And Removing A Faulty Ram But Now I Have Tried Reseating The rams. I Have 4 Rams 1 Was Faulty So I Have Stored It Elsewhere But Now On 3 Working Rams Its Not booting up, I Tried Cleaning Rams with Runbber Eraser But It Didn't Boot Up. but Yeah, When I Was Reseating One ram When I Put It In Slot Pc Restarted When I Took it Out Pc Restarted. Now I am doubting That, That Ram Is Faulty Please Below Are pictures Of My CPU And Ram Please do tell me if you need anymore pictures to help me.
Best Regards, Safeer.