B760 Pro RS // DRAM light Solid Red

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   My Rig suddenly failed to boot up. At a recent startup I found the DRAM light is solid red, and no screen inputs. The Rig is now installled with 2x DDR5 6000 RAMs.

When I installed the motherboard along with the new Drams I mistakenly placed the rams at the left 2 slots:

    ([1] [2] 3  4 , A1 and A2, I suppose?) .

Before this incident, the system need a longer period to boot up, but eventually IT WILL successfully boot up and the system works just as normal. 

However during the latest boot the system just not showing any output. After I hit the Power On button on my rig, all the POST LED lihgts blinked, and only the DRAM light remains solid red. 
Later on I tried re-arrange the DRAMs to the correct layouts: 

    ( 1 [2] 3 [4], A2 and B2 respectively) 

but the system still have no video outputs and thus I have no access to the BIOS interface. I failed to perform a BIOS flashback cause I cannot find the slot or the BIOS Flashback button on the motherboard.

Is there any clues of solving it?

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Gary0720 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 May 2024 Status: Offline Points: 50	Post Options Post Reply Quote Gary0720 Report Post Thanks(0) Quote Reply Topic: B760 Pro RS // DRAM light Solid Red Posted: 16 May 2024 at 2:48pm
	My Rig suddenly failed to boot up. At a recent startup I found the DRAM light is solid red, and no screen inputs. The Rig is now installled with 2x DDR5 6000 RAMs. When I installed the motherboard along with the new Drams I mistakenly placed the rams at the left 2 slots: ([1] [2] 3 4 , A1 and A2, I suppose?) . Before this incident, the system need a longer period to boot up, but eventually IT WILL successfully boot up and the system works just as normal. However during the latest boot the system just not showing any output. After I hit the Power On button on my rig, all the POST LED lihgts blinked, and only the DRAM light remains solid red. Later on I tried re-arrange the DRAMs to the correct layouts: ( 1 [2] 3 [4], A2 and B2 respectively) but the system still have no video outputs and thus I have no access to the BIOS interface. I failed to perform a BIOS flashback cause I cannot find the slot or the BIOS Flashback button on the motherboard. Is there any clues of solving it?

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 25028	Post Options Post Reply Quote Xaltar Report Post Thanks(1) Quote Reply Posted: 16 May 2024 at 2:58pm
	Try a single RAM module is slot A2, clear CMOS and power on. If it still won't POST (show a display with the ASRock logo) then try the other module in slot A2. If neither module brings up the POST screen then try disconnect the system from power, pull the CMOS battery, press and hold the power button for 5 - 10 seconds and leave the system like that for 10 mins or so. You can then replace the battery and reconnect power to the system and try again. If this also fails then you can see about trying with another power supply. There is a chance your existing power supply is faulty and causing the system to hang during POST (power on self tests) at the RAM testing phase. If after all this you still have a non functional system then it's likely your CPU may have died, more specifically the IMC (integrated memory controller) on the CPU. If the CPU is still under warranty it will be covered for return/replacement. Hopefully that isn't the case but sadly it is fairly common on CPUs these days. Good luck


Gary0720 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 May 2024 Status: Offline Points: 50	Post Options Post Reply Quote Gary0720 Report Post Thanks(0) Quote Reply Posted: 16 May 2024 at 3:12pm
	Thanks for the reply! Some updates: I tried change the CMOS battery and using a single slot DRAM at B2 ( 1 2 3 [4] ) made a successfull boot up into the BIOS, at first the DRAM light still solid red, but later DRAM light goes dark and BOOT and VGA light became solid red for a few seconds, then all 4 lights gone, the system boot up and goes into BIOS interface. I suspect one of the two DRAM cards is broken but I'm not sure. While writing this post I'm trying to reboot the system again with both DRAM cards inserted at A2 and B2 DIMM slots.

Gary0720 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 May 2024 Status: Offline Points: 50	Post Options Post Reply Quote Gary0720 Report Post Thanks(0) Quote Reply Posted: 16 May 2024 at 4:07pm
	Update: I figure out the issue. One of my DRAM card failed. When both of them were plugged into the MB(motherboard) the motherboard shows a solid red light at DRAM and thus cannot enter BIOS mode. I tested in two ways: testing both DRAMs at the same DIMM socket, and test each of them at different socket. Turns out all slots on MB works perfectly fine, but one of my DRAM cards broken. Hmm considering I just bought it a month ago that's really weird... FYI those are *CORSAIR VENGEANCE DDR5 16GB cards* . I just wonder why one of the two fails, but that's a different story.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 25028	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 16 May 2024 at 4:59pm
	Just unlucky, it happens. This is why there is a warranty. Most often tech components will fail inside a month, if not, they tend to be fine for ages. It all has to do with how things like RAM chips are binned (sorted). Each chip is tested and put in bins depending on how it performs, weaker chips get put on RAM modules with lower frequencies and voltages where better ones get put on faster modules with more voltage, different "bins". Often a chip can pass the testing for a particular bin but fail shortly after because it was not quite up to the task for 24/7 use. Glad you got it sorted out