Question ASUS M5A78L LE won’t post/no display

Jan 28, 2023
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Recently purchased an Asus m5a78l le to replace an am3 motherboard for an amd fx cpu. Unfortunately, after assembling the pc it wouldn’t post. I assumed it was because I tried to use hdmi, however it still wouldn’t post after trying both vga and dvi on two different gpus. I moved on to check the ram by checking the seating, switching channels, using only stick, and repeating that process with a different set of ram. Still nothing. I went on to reset CMOS, but still couldn’t get the computer to post. I stripped the computer to the essentials and got the same result. I’ve tried flash booting which didn’t work, but to be fair I’m not certain I did it right. I can’t find much information about the LE online but I have heard that the m5a78l’s won’t boot without a keyboard. I’ve tried two different usb keyboards, however I wonder if I need to use a ps/2 board (which I don’t have). Other than that, the only diagnosis I can come with is that either the IO is dead or the pci slot is. Hopefully someone here knows more than me. Here’s my components for those interested:

•CPU: AMD FX-8300
•GPU: Radeon R9 390
•RAM: TEAMGROUP 16gb (8x2) DDR3 1600MHz
•PSU: ARESGAME 650w 80+ Bronze
•CPU Cooler: Cooler Master Hyper 212 Evo
•HDD: WD Blue 4TB
 
Recently purchased an Asus m5a78l le to replace an am3 motherboard for an amd fx cpu. Unfortunately, after assembling the pc it wouldn’t post. I assumed it was because I tried to use hdmi, however it still wouldn’t post after trying both vga and dvi on two different gpus. I moved on to check the ram by checking the seating, switching channels, using only stick, and repeating that process with a different set of ram. Still nothing. I went on to reset CMOS, but still couldn’t get the computer to post. I stripped the computer to the essentials and got the same result. I’ve tried flash booting which didn’t work, but to be fair I’m not certain I did it right. I can’t find much information about the LE online but I have heard that the m5a78l’s won’t boot without a keyboard. I’ve tried two different usb keyboards, however I wonder if I need to use a ps/2 board (which I don’t have). Other than that, the only diagnosis I can come with is that either the IO is dead or the pci slot is. Hopefully someone here knows more than me. Here’s my components for those interested:

•CPU: AMD FX-8300
•GPU: Radeon R9 390
•RAM: TEAMGROUP 16gb (8x2) DDR3 1600MHz
•PSU: ARESGAME 650w 80+ Bronze
•CPU Cooler: Cooler Master Hyper 212 Evo
•HDD: WD Blue 4TB
I'm fairly certain the mobo needs a bios update to support your CPU in which case you need a CPU that's supported to update the bios before using the 8300
 
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DSzymborski

Titan
Moderator
Honestly, if another CPU didn't work, I'd be inclined to simply think there's an issue with the motherboard and return it. This was pretty much the bottom-of-the-barrel mainstream AM3+ motherboard, and I'd swap it and get something else before wasting too much time trying to resucitate it.
 
Jan 28, 2023
4
1
15
Honestly, if another CPU didn't work, I'd be inclined to simply think there's an issue with the motherboard and return it. This was pretty much the bottom-of-the-barrel mainstream AM3+ motherboard, and I'd swap it and get something else before wasting too much time trying to resucitate it.
Yeah I’m thinking the same thing. I just didn’t want to wait another week