Question New PC build no input detected on monitor

[Kseedy]

Hi all,

New user here, I have just put together my first new PC build and it's not registering a display.

My build:
Case - Xigmatek LUX G Tempered Glass Mid Tower
Motherboard - Maxsun Challenger H510M-H
CPU - Intel Core i5-10400F
CPU FAN - Xigmatek Air Killer S RGB CPU Cooler
Ram - 16GB Netac Shadow II Dual RAM Kit
SSD - 1TB Netac NV3000 SSD
HDD - 1TD Seagate (old harddrive from previous PC)
GPU - Radeon HD 5450(old GPU from previous PC)
PSU - 650W Xigmatek Minotaur PSU

I am using my old GPU before I upgrade to the 4060-ti.

When I turn it on all the PC fans and LEDs turn on, the CPU fan turns on, the HDD can be heard whirring away and the GPU fan is working, I plug into the GPU via HDMI, no display detected. I try the VGA, no display detected. I have put old GPU back into old PC without HDD and boots into bios fine. Put GPU back into new PC, took put 1 Ram, no display detected, tried other same result, checked all cables connected and Ram/GPU pushed in far and clipped. I used anti static wrist when putting together. I have plugged the PSU 24 pin into the mobo but nothing into the 4pin 12v slot on the mobo as not cable/slot on the PSU. Nothing seems to be able to detect a display input. Hoping someone can help as I'm racking my brain trying to figure out what it could be, possibly Im thinking incompatible ram or bios cant detect old GPU? Cheers.

 

[Lutfij]

I have plugged the PSU 24 pin into the mobo but nothing into the 4pin 12v slot on the mobo as not cable/slot on the PSU
if your PSU lacks the cable/connector for the EPS connector on the motherboard, you either have the wrong PSU for the job or your have the wrong parts for your PSU. You should plug in the 24pin + 4pin EPS on the motherboard.

Speaking of PSU's, how old is the unit? Brand new? Then why don't you have an EPS cable for the unit? According to their site;

XIGMATEK

Xigmatek's mission is to advance the state of technology in the cooler, chassis and power supply product categories.

www.xigmatek.com

you should have access to a single 4+4pin EPS connector, at the very least.

 

[Kseedy]

I have plugged the PSU 24 pin into the mobo but nothing into the 4pin 12v slot on the mobo as not cable/slot on the PSU
if your PSU lacks the cable/connector for the EPS connector on the motherboard, you either have the wrong PSU for the job or your have the wrong parts for your PSU. You should plug in the 24pin + 4pin EPS on the motherboard.

Speaking of PSU's, how old is the unit? Brand new? Then why don't you have an EPS cable for the unit? According to their site;

XIGMATEK

Xigmatek's mission is to advance the state of technology in the cooler, chassis and power supply product categories.

www.xigmatek.com

you should have access to a single 4+4pin EPS connector, at the very least.

Thanks Lutfij,
The PSU is brand new (everything except the GPU and HDD is new) the psu came with a number of connectors and 1 does have 4+4 cables but the 4 pin is reversed to the 4pin 12v on the mobo. I.e the connection is rounded, square, square rounded (top left, top right, bottom left, bottom right) on the cable for the psu it's square, rounded, rounded, square if that makes sense - so it can't plug in. If it doesn't have the 4pin 12v plugged on could that effect bios from showing?
Cheers

 

[Kseedy]

Thanks Lutfij,
The PSU is brand new (everything except the GPU and HDD is new) the psu came with a number of connectors and 1 does have 4+4 cables but the 4 pin is reversed to the 4pin 12v on the mobo. I.e the connection is rounded, square, square rounded (top left, top right, bottom left, bottom right) on the cable for the psu it's square, rounded, rounded, square if that makes sense - so it can't plug in. If it doesn't have the 4pin 12v plugged on could that effect bios from showing?
Cheers

Actually I notice one side of the 4+4 fit into the 12v slot on the mobo (duh I didn't try the other side now) now I'm wondering where this goes on the PSU, it's 8 pin on the other end but the psu has 24pin for power 4x 6pin L4P Sata and 4x 8 pin CPU PCIe slots. Not sure where to plug in the 4+4 or 8pin from mobo in the PSU?
UPDATE:
I have tried the 8pin end into one of the CPU PCIe slots (with the other end 4+4 one half into the mobo 12v) and still the same...