2022 Zephyrus G14 GA402RK BIOS + IC

[Madokami]

I have a G14 GA402RK that I (stupidly) changed the wrong settings on and now does not post. I changed the SOC power and the Above 4G MIMO limit.

The device fans will ramp up and down as the temp rises, and the keyboard lights up, but the nothing else happens. It also powers up when plugged into the AC power but not USB or battery power. All of this makes me think it still works, I just need to slap a new BIOS on it.

I tried identifying the IC with a CH341A programmer, but I could only find the GPU BIOS. I also read somewhere on this forum that Asus has used multi-IC BIOS solutions in the past, which makes this more fun for a newbie like me.

Attached are pictures of the board, and the code behind the RAM slots which I think identifies the motherboard. If anyone can help me identify the BIOS IC and how to burn the new image on it if it's not a standard 8 pin IC, I would be very appreciative. Any and all help would be appreciated actually.

[volinakis]

Re: 2022 Zephyrus G14 GA402RK BIOS + IC

I have a G14 GA402RK that I (stupidly) changed the wrong settings on and now does not post. I changed the SOC power and the Above 4G MIMO limit.

there are 3 eeproms on your board, I think one from the left is Bios chipset - the middle is VBios and on the right is TBT. Take a clear photo of the code on chipset.

[Madokami]

Re: 2022 Zephyrus G14 GA402RK BIOS + IC

The one on the left is 24512A P21A02 and the one on the right is 24512A P21A03. Middle one is GD PJ2133, and is the one I got the gpu info from.

[volinakis]

Re: 2022 Zephyrus G14 GA402RK BIOS + IC

The one on the left is 24512A P21A02 and the one on the right is 24512A P21A03. Middle one is GD PJ2133, and is the one I got the gpu info from.

yep, not bios chipset any of them. Maybe is on back of the motherboard, I will search on net.
Edit: can't get a clear image but i think that's the one

[Madokami]

Re: 2022 Zephyrus G14 GA402RK BIOS + IC

yep, not bios chipset any of them. Maybe is on back of the motherboard, I will search on net.
Edit: can't get a clear image but i think that's the one

Yep, that's it. Winbond 74m25jweiq. I don't think the alligator clips will be able to grab this and I don't think I have the skill to desolder it. Is there any advice or a different method of reading/writing that you can recommend?

[volinakis]

Re: 2022 Zephyrus G14 GA402RK BIOS + IC

Yep, that's it. Winbond 74m25jweiq. I don't think the alligator clips will be able to grab this and I don't think I have the skill to desolder it. Is there any advice or a different method of reading/writing that you can recommend?

nope, just remove it and read with adapter. Attention, is 1,8V chipset. See if you have some jumpers around ram slots to reset it, if you say you only changed something in settings.

[Madokami]

Re: 2022 Zephyrus G14 GA402RK BIOS + IC

nope, just remove it and read with adapter. Attention, is 1,8V chipset. See if you have some jumpers around ram slots to reset it, if you say you only changed something in settings.

There are no jumpers on the motherboard, which is why I was looking to rewrite the BIOS. Removing the battery for an extended period did not help either. It would be nice if there were contacts on the board I could short to clear CMOS, but I don't see any and don't know enough to start poking around without guidance.

[volinakis]

Re: 2022 Zephyrus G14 GA402RK BIOS + IC

There are no jumpers on the motherboard, which is why I was looking to rewrite the BIOS. Removing the battery for an extended period did not help either. It would be nice if there were contacts on the board I could short to clear CMOS, but I don't see any and don't know enough to start poking around without guidance.

sorry, I don't have clear images of your motherboard to start looking for reset pads.
Remove CMOS battery and hold power button for 30s to drain all current left in capacitors, maybe it will reset bios.

[Madokami]

Re: 2022 Zephyrus G14 GA402RK BIOS + IC

sorry, I don't have clear images of your motherboard to start looking for reset pads.
Remove CMOS battery and hold power button for 30s to drain all current left in capacitors, maybe it will reset bios.

Unfortunately there's no cmos battery. I've tried removing the battery and letting it sit overnight, and that did not work. Here is a picture of the back side if that will help.

[Akstorm02]

Hey ! Did you find a bios image ? If you did I'm having similar issues if you can send me the bios image it would be very nice i have asus g14 ga402rk Ryzen 9 6900hs and rx6800s 2022

[GigElectron]

Hi there. Please note that you are missing RTQ5132GQWF (chip marked as 0H=). It is an integrated power management IC suitable for general DDR5 SODIMM and UDIMM applications. I hope this helps.

[pizrat]

i bricked my bios using the smokeless umaf tool and trying to tighten ram timings. i purchased a ch341a programmer and made the mistake of not backing up my bios before flashing the stock bios on the chip. i tried injecting my serial and all in the bios and then flashing but now the hdd light just blinks when powering on and nothing else. ill attach the firmware i flashed to the chip and the default i added it to. also the chip is a winbond W74M25JWEIQ. my serial is N2NRKD019645059

I know I'm reviving a zombie topic, but did you ever get your bios working again? I bought a GA402RK online that's exhibiting the same symptoms. When attempting to power on, the HDD blinks once then waits about 5-8 seconds, then blinks again and just loops like this. It doesn't matter if it's plugged in to wall power or running off of battery. I tried disconnecting all peripherals and the SSD to see if it acts differently but it doesn't. Any advice or help would be greatly appreciated!

[SMDFlea]

Moved from GA402RJ topic to GA402RK

[peste]

I know I'm reviving a zombie topic, but did you ever get your bios working again? I bought a GA402RK online that's exhibiting the same symptoms. When attempting to power on, the HDD blinks once then waits about 5-8 seconds, then blinks again and just loops like this. It doesn't matter if it's plugged in to wall power or running off of battery. I tried disconnecting all peripherals and the SSD to see if it acts differently but it doesn't. Any advice or help would be greatly appreciated!

post S/N, full name and model, motherboard model, ,etc.

post the contents of the bios chip even if it is corrupted..

Post a picture of the QR code near the ram slot, or scan it yourself and post what it says.

[hichamhb]

HI . i want to repair this bios ( no display )
Model: Asus ROG Zephyrus G14
SN : N3NRKD011930106
Motherboard: mb ga402rk ddr5x16 r2.2

[SMDFlea]

Moved from GA402RJ topic to GA402RK

[shiyab]

HI . i want to repair this bios ( no display )
Model: Asus ROG Zephyrus G14
SN : N3NRKD011930106
Motherboard: mb ga402rk ddr5x16 r2.2

hi try

[pizrat]

post S/N, full name and model, motherboard model, ,etc.

post the contents of the bios chip even if it is corrupted..

Post a picture of the QR code near the ram slot, or scan it yourself and post what it says.

Sorry for the delay. Here's the information:

• SN: N7NRKD02370427C
• Asus Zephyrus G14 (Model: GA402R)
• GA402RJ-G14.R96700
• Motherboard Model: GA402RK R2.1

Attached pictures are of the Model Number sticker, Serial Number Sticker, Motherboard Model and Revision, and QR code next to RAM slot. I checked voltages and have 20v on the main rail where I should. I checked for shorts and couldn't find any with a thermal camera and with a multimeter. I've tried swapping hardware out. Doesn't matter if it's powered by battery, charger, or thunderbolt. I've tried holding the power button for 30-60 seconds to reset the EC. No matter what I try, the laptop will only flash the HDD status light every 7-10 seconds. Fans never spin up and no keyboard or display backlights come on. My NVME drive has an LED status light that DOES come on during boot but goes out when the laptop starts it's boot cycle all over again. It's acting like it's attempting to boot and gets to a certain point in the process before resetting again. I'm hoping it just needs a new BIOS at this point. I can measure 20v going all the way to the mosfets right before the CPU and GPU but nothing is coming out of them. Thank you in advance for any and all help. I'm really banging my head trying to fix this laptop.

[shiyab]

Sorry for the delay. Here's the information:

• SN: N7NRKD02370427C
• Asus Zephyrus G14 (Model: GA402R)
• GA402RJ-G14.R96700
• Motherboard Model: GA402RK R2.1

Attached pictures are of the Model Number sticker, Serial Number Sticker, Motherboard Model and Revision, and QR code next to RAM slot. I checked voltages and have 20v on the main rail where I should. I checked for shorts and couldn't find any with a thermal camera and with a multimeter. I've tried swapping hardware out. Doesn't matter if it's powered by battery, charger, or thunderbolt. I've tried holding the power button for 30-60 seconds to reset the EC. No matter what I try, the laptop will only flash the HDD status light every 7-10 seconds. Fans never spin up and no keyboard or display backlights come on. My NVME drive has an LED status light that DOES come on during boot but goes out when the laptop starts it's boot cycle all over again. It's acting like it's attempting to boot and gets to a certain point in the process before resetting again. I'm hoping it just needs a new BIOS at this point. I can measure 20v going all the way to the mosfets right before the CPU and GPU but nothing is coming out of them. Thank you in advance for any and all help. I'm really banging my head trying to fix this laptop.

hi try