I am helping my friends build a new system. We got it all together and it will not power on at all.
CPU: AMD Athlon X4 740 3.2GHz Quad-Core Processor ($74.99 @ Newegg)
CPU Cooler: Zalman CNPS7000V(AL)-1-PWM CPU Cooler ($12.99 @ TigerDirect)
Motherboard: MSI A88XM-E35 Micro ATX FM2+ Motherboard ($67.99 @ Amazon)
Memory: Kingston Black 8GB (2 x 4GB) DDR3-1600 Memory ($89.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ Newegg)
Case: Silverstone ML03B HTPC Case ($66.98 @ SuperBiiz)
Power Supply: Corsair CX 430W 80+ Bronze Certified Semi-Modular ATX Power Supply ($52.98 @ Newegg)
Optical Drive: LG UH12NS30 Blu-Ray Reader, DVD/CD Writer ($47.27 @ TigerDirect)
Wireless Network Adapter: TP-Link TL-WN725N 802.11b/g/n USB 2.0 Wi-Fi Adapter ($8.99 @ Newegg)
Keyboard: Cooler Master CM Storm Devastator Gaming Bundle Wired Gaming Keyboard w/Optical Mouse ($32.98 @ Newegg)
Other: XFX R7-250A-ZLF4 Radeon R7 250 ($105.38)
I've made sure she had the front panel connections are on correctly, all the power leads are in correctly and plugged into the wall properly. Any possible flukes so far?
First off, verify that the power supply is working. Disconnect it entirely from the PC, plug it in, and on the main motherboard power connector, use a base-metal paperclip to bridge the green lead to any black lead. This will simulate the motherboard initiating a power-on. You should hear the power supply power up, and (depending on the model, I think the CX series does) the fan will kick on. If you can't tell, plug in the power lead to the hard drive and listen for spin-up.
If this works, then the problem is a) with the switch connection to the motherboard, or b) the motherboard being improperly grounded and refusing to power up to protect itself. Connect the motyherboard power leads and video card power lead (if so equipped). Check the switch connection carefully to the diagram in the manual, and if it seems right, try manually bridging the ends with the tip of a steel flad-bladed screwdriver (be VERY CAREFUL here) to see if the switch itself is the problem. If no luck there, remove the motherboard carefully, and verify that there are no metal case standoffs that do not align with the holes in the motherboard.
If you do get power-up, slowly start to reconnect devices one at a time to see if one grounds out and causes the PSU to shut off into fail-safe.
My first built computer back to the year 97 has the same problem, no sign of powering ON, the problem was caused by the static that damaged the mobo.
I believed I did touch the mobo on the metal case once when installing.
After replacing the mobo, power on and runs.
The PC I bulit at that time is PII350 100mhz bus PII333 was a 66mhz at that time.
Still power supply need to be checked as well.
ALso if there is any 4/6 pins power connector for the video card, pleaes remember to connect that as well.
Hope this helps.
Tech Manager, WPTinc.
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