• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Need help on custom build pc problem

Kevin vang

New Member
Joined
Aug 28, 2015
Messages
18 (0.01/day)
Hello all, I had a post about a custom build pc on this site last week and needed help and did get help and the very next week i went and bought the components and stuff for it.
Following day of when i bought it, me and my bro built the computer and everything went fine until we plugged our monitor vga/power cord to the wall and gpu. We tried plugging the vga to the motherboard also to see if they monitor picked up signal but sadly it didn't to the motherboard or gpu.
And so...we thought it was the cords of us wrong doing and we took the parts off and had to redo it.
On our second try this time though, We put everything together and when we tried to power it on, the computer turns on for only a split second with all fans running for a split second and then powers off.
3rd try same thing happened and so we gave up and now im on here.

Please help me as I have no idea what the problem is.

If you need anymore info, ask!
 
Joined
Jan 17, 2010
Messages
12,280 (2.37/day)
Location
Oregon
System Name Juliette // HTPC
Processor Intel i7 9700K // AMD Ryzen 5 5600G
Motherboard ASUS Prime Z390X-A // ASRock B550 ITX-AC
Cooling Noctua NH-U12 Black // Stock
Memory Corsair DDR4 3600 32gb //G.SKILL Trident Z Royal Series 16GB (2 x 8GB) 3600
Video Card(s) ASUS RTX4070 OC// GTX 1650
Storage Samsung 970 EVO NVMe 1Tb, Intel 665p Series M.2 2280 1TB // Samsung 1Tb SSD
Display(s) ASUS VP348QGL 34" Quad HD 3440 x 1440 // 55" LG 4K SK8000 Series
Case Seasonic SYNCRO Q7// Silverstone Granada GD05
Audio Device(s) Focusrite Scarlett 4i4 // HDMI to Samsung HW-R650 sound bar
Power Supply Seasonic SYNCRO 750 W // CORSAIR Vengeance 650M
Mouse Cooler Master MM710 53G
Keyboard Logitech 920-009300 G512 SE
Software Windows 10 Pro // Windows 10 Pro
You should always bench test a new system before placing it in the case. This confirms that everything works. 9/10 times there is a short cause by the case. So that's your next step. (people tend to put risers in the wrong place or leave out)

And only the motherboard, one stick of ram, CPU and monitor. See if it POSTs Obviously placing it on a non conductive surface. The box works. Just short the power pins on the front header. (make sure you check which one they are)

Also if its a Intel CPU be careful of the pins.
 
Last edited:

Kevin vang

New Member
Joined
Aug 28, 2015
Messages
18 (0.01/day)
You should always bench test a new system before placing it in the case. This confirms that everything works. 9/10 times there is a short cause by the case. So that's your next step.

And only the motherboard, one stick of ram, CPU and monitor. See if it POSTs

Also if its a Intel CPU be careful of the pins.
Damn Im really dumb but as of right now I sent the computer to microcenter yesterday to look at it and see what the problem is, but yes we have troubleshooted them, one I haven't done though is the monitor which I should do rn as I have it.
 
Joined
Jul 25, 2006
Messages
12,014 (1.86/day)
Location
Nebraska, USA
System Name Brightworks Systems BWS-6 E-IV
Processor Intel Core i5-6600 @ 3.9GHz
Motherboard Gigabyte GA-Z170-HD3 Rev 1.0
Cooling Quality case, 2 x Fractal Design 140mm fans, stock CPU HSF
Memory 32GB (4 x 8GB) DDR4 3000 Corsair Vengeance
Video Card(s) EVGA GEForce GTX 1050Ti 4Gb GDDR5
Storage Samsung 850 Pro 256GB SSD, Samsung 860 Evo 500GB SSD
Display(s) Samsung S24E650BW LED x 2
Case Fractal Design Define R4
Power Supply EVGA Supernova 550W G2 Gold
Mouse Logitech M190
Keyboard Microsoft Wireless Comfort 5050
Software W10 Pro 64-bit
Let us know what they found out.

My initial suspects are (1) extra brass standoffs under the motherboard (Jetster refers to them as risers). Cases are designed to support 1000s of different motherboards so they typically have more motherboard mounting holes than the motherboard. It is not uncommon for new builders (and distracted experienced builders) to put an extra standoff or two in the case, shorting out the board when power is applied. Typically no permanent damage is done and all works once the extra standoff(s) is removed. There is no potential for electrical damage if you omit a needed standoff, but that can result in a lack of support for the board which can result in damage from too much flexing when pressing down to install RAM or mount the CPU cooler.

(2) Missing power cable to the motherboard or graphics card (if using a graphics card). Most motherboards today require two connections from the power supply and many graphics cards require 1 or 3 power connections from the supply.

(3) Incorrectly or missing CPU fan connection (did you hear any beeps).

(4) Bad power supply.
 

Kevin vang

New Member
Joined
Aug 28, 2015
Messages
18 (0.01/day)
So apparently it was because 2 pins fell off and reason why it wasn't working. (Typing on the new computer) :D
 
Joined
Jan 17, 2010
Messages
12,280 (2.37/day)
Location
Oregon
System Name Juliette // HTPC
Processor Intel i7 9700K // AMD Ryzen 5 5600G
Motherboard ASUS Prime Z390X-A // ASRock B550 ITX-AC
Cooling Noctua NH-U12 Black // Stock
Memory Corsair DDR4 3600 32gb //G.SKILL Trident Z Royal Series 16GB (2 x 8GB) 3600
Video Card(s) ASUS RTX4070 OC// GTX 1650
Storage Samsung 970 EVO NVMe 1Tb, Intel 665p Series M.2 2280 1TB // Samsung 1Tb SSD
Display(s) ASUS VP348QGL 34" Quad HD 3440 x 1440 // 55" LG 4K SK8000 Series
Case Seasonic SYNCRO Q7// Silverstone Granada GD05
Audio Device(s) Focusrite Scarlett 4i4 // HDMI to Samsung HW-R650 sound bar
Power Supply Seasonic SYNCRO 750 W // CORSAIR Vengeance 650M
Mouse Cooler Master MM710 53G
Keyboard Logitech 920-009300 G512 SE
Software Windows 10 Pro // Windows 10 Pro
SO now that you got it working fill out your specs in your profile and show some pics
 
Top