First PC Build Would Not Post. The Store Said Replace the Motherboard. It Needed a Couple of Connections.
A first PC build would not post or put a picture on the monitor. The store that sold the parts diagnosed bent motherboard pins and quoted a new board plus labor. The motherboard was fine: a couple of connections were in the wrong place. Corrected, cables routed, posting and back the same day after about two and a half hours at the bench.
“If you want quality work done for a great price this is my #1 recommendation!!! I recently built my first pc and had NO idea why it wouldn’t post or give my monitor a signal… Justin thoroughly examined my pc and told me there was nothing wrong with my motherboard, I just plugged some things in incorrectly. He finished my pc in about 2 1/2 hours including neat cable management! He communicates very clearly, responds fast, and has an outgoing personality… I personally will recommend this place to anyone who has ANY pc/laptop issues, questions and concerns over any other tech shop out there.”
— Ashley S. · Google review · Read the full storyThis one came in as a brand new build that would not do anything useful. Every part had been picked out, everything had been assembled for the first time, and pressing the power button got no post and no picture on the monitor. For a first build, that is about the most deflating moment there is.
Before calling me, the customer had taken it back to the store where the parts came from. The store’s diagnosis was bent pins on the motherboard, and the fix on offer was a new board plus the labor to rebuild everything around it.
What “won’t post” actually means
POST is the power-on self-test, the first check a computer runs before it ever shows you a logo. When a new build fails it, the fans usually spin and the lights come on, but the screen stays black and nothing else happens. On a first build that almost always points at something basic: a cable, a seating problem, a switch lead on the wrong pins. A dead part is possible, but it is rarely the first answer.
What I found
I picked the PC up, took it apart at the bench, and went through the board and every connection. The motherboard was fine. The problem was a couple of connections that were not where they needed to be. Once those were corrected, it posted and the monitor came on.
While it was open, I finished the build properly, with the cables routed and tied down so it looks the way a first build should. About two and a half hours at the bench, and it went back the same day.
The first-build checklist before you buy another part
- The power switch lead. The tiny front-panel header is labeled on the board. A switch lead one pin over means the button does nothing.
- Both power cables to the motherboard. The wide 24-pin and the 8-pin CPU cable near the top corner. A missing CPU cable is one of the most common first-build no-posts.
- Memory fully seated. Push until both clips snap, and use the two slots the manual names for a two-stick setup.
- Graphics card power, and the right monitor port. The card needs its own power cables, and the monitor plugs into the graphics card, not the motherboard.
- The debug lights. Many boards have small CPU, DRAM, VGA, and BOOT lights. The one that stays lit tells you which stage failed.
If you have been through that list and it still sits there with a black screen, have it diagnosed before you order anything.
Why diagnose before you replace
Swapping a motherboard on a new build means pulling the processor, cooler, memory, and every cable, and it does nothing for a connection problem. You can pay for all of that and end up exactly where you started. Diagnosis here is free, so the first thing you get is the actual cause, and only then a price.
If your new build will not post, book a time online or call or text 770-356-4462. And if you are still at the planning stage, the build sheet gets you a parts list that is checked for compatibility before anything ships.
Questions people ask
Why won't my new PC build post?
On a first build it is usually something basic: the power switch lead on the wrong front-panel pins, the 8-pin CPU power cable left unplugged, memory not fully seated, or the monitor plugged into the motherboard instead of the graphics card. A dead part is possible but rarely the first answer.
Do bent pins mean I need a new motherboard?
Not automatically. Have the board and every connection checked first. In this case the store called it bent pins and the motherboard turned out to be fine.
Can you fix a PC I built myself?
Yes. Bring it in or I can pick it up. Diagnosis is free, so you hear the actual cause before any price, and I can tidy the cable routing while it is open.