Zitat von Lost_N_BIOS im Beitrag #390

---

Thanks for the reply back, here you go @sickyturtle - BIOS only contains >> 506E3 - C6 / 506E8 - 34 / 906EB - 72

https://www.sendspace.com/file/agyi0k

---

Seemingly the pencil trick didn't work in my case. I have tried to get i5 8400 work on my board but always when I push the power button the fans just try to start spinning. The ME version is 11.6.0.1126 and this mod bios works with i3 8350k. I have also updated the microcodes, of course. Maybe there is some kind of conductivity problem between the "shorted" pads. I used several 8b pencil though.

probably ME issue, see post #367

How could this be a ME issue if everything works with my i3 cpu? The resistance between the shorted pads was about 100 000 Ohm.
I tried again with the cleaned cpu and the booting experience was same.

@mcf cause the i3 only has the Name Coffee Lake, under the hood it´s a Kaby Lake.

@oldirdey I know that but it can be a shorting issue too (the post #162). Maybe I have to test some kind of copper tape / conductive ink. I didn't change the SKU, but that shouldn't prevent the board booting?

@Dnatwork did you try to boot your system with failed cpu shorting? If so, was the reaction similar compared to my case (#392)?

@mcf at first I didn’t know I had to short those two pads, so the fan spun up momentarily and shut off. I used a 2B pencil to short the pads. The first time it worked great probably 200 ohms), but then I changed the fan and did something to the cpu, and it stopped working. I had to try several times to get the resistance back down low enough to work. It would not work at 500 ohms.

If you really meant 100,000 ohms, that’s way too high.

Some people say to use conductive ink. Silver is best, carbon should work.

I have an ASRock H110M board. If yours is some other brand, they probably set it it to work with a different amount of resistance.

@mcf yes, if 6 core is used than you need to clean the ME or change sku to 370, otherwhise it will fail to post. The sympton is the same as not shorting the pads. read post #367 from s.napi.

Try to get some conductive tape. It´s much more reliable then the pencil mod.

@Dnatwork this is an Asrock board (H110M DGS R3) so maybe the problem is too high resistance between the pads. What's the ME version you have used?

@mcf I have 11.6.whatever. It came with 11.8.5, so I had to downgrade it using gnu grub according to the post by @MOB. I can’t remember the number, but someone just quoted it above. If you need that, also look for my response where I gave very detailed steps to make it work. Maybe you don’t need them.

Someone just said to change the SKU to Z370. I did that because I was told to, and it made everything work very badly. USB was flipping out, system kept hanging. I reverted to the first BIOS mod I made (using BIOS downloaded from ASRock site, dated October 2017, and I think microcode 72 for the i7-8700), and all problems went away.

I suppose one problem could be if you have the wrong microcode, or a newer one that Intel has updated so it won’t work on old boards. (I know that’s what ME does, but I don’t trust Intel.) I had difficulty finding the right microcode for the 8700, and there was even less info available about the 8400 when I was looking in March. But they should all be available now.

@mcf you may have too many pins masked. It should be only two power pins, not four. See the picture in this thread:

Fixing PCI-Express for Coffee Lake CPUs on Sky/Kaby Lake non-Asrock(and some new Asrock) motherboards

And I had a much thicker layer of pencil on and between the two shorted pads. You have to get down to 300 ohms or so. I scraped the pencil over them, spun it in place, but I pressed very lightly. Pressing hard actually scrapes the graphite off the surface. It had to be rather thick, so the pads and the area between were basically black. Any lighter, and it did not work for me.

@Dnatwork if I have understood right those pins should be reserved and hence not problem. But there are so many details I have ignored that I must do some research.

@mcf in my experience (asus), with sktocc not grounded, system will not power up at all. ME caused immediate shutdown. I believe wrong SKU did the same, but maybe it was only no post. Not sure what missing ucode does (4c is 906eb while 6c is 906ea)

@oldirdey are you saying you don't need to change sku to z370 if you clean the ME? I know I tested not changing SKU (with known good 11.6.xxxx ME) and it did not work. Changed SKU to z370 again and all is good.

@ziddey exactly. Maybe there are other ways to get 6 Core CFL working, but I only know these 2 Options. Even with vBios and GOP Update CPU will not post if SKU is not changed/ME cleared.

@mcf
In my BIOS, I have stripped ME (me_cleaner) and SKU changed to Z370. I don't know if changing SKU only/cleaning ME only is sufficient and I can't experiment now. But wrong microcode/pcie fix/vbios will let the board power on - it will probably not POST but the fans will be spinning/leds flashing. So in your case it is probably ME issue or 2 CPU pins not connected/shorted. On my ASUS board, turning power button without connected pins resulted in no draw of power from wall socket (no led on board turned on), with connected pins but wrong ME/SKU there were very brief (fraction of second) draw of power (and some led lighted up).