P870DM Motherboard replace = black screen no display

Hello, i'm writing here with regard of my P870DMG i have replaced motherboard, but there's no display only computer turns on. The seller i bought motherboard from noted that i should use it with 970M card, but mine is GTX980 200W so question, is it BIOS which i should update to use GTX980 graphics card?
But i cannot enter BIOS since screen stays unlit- dark after turn on.

 

Did you have this problem prior to replacing the motherboard? Any display on an external screen?

You shouldn't need to update the system BIOS as long as the 980 is a Clevo card with the correct vBIOS.

 

Check the 980 has the extra power cable correctly seated, I doubt it would work without it.

 

No, never had this problem. External HDMI my TV only sees HDMI , but no signal or display. The motherboard has same part number, but it's Chinese modified i assume . I bought it from Aliexpress , they didn't sent same motherboard as in picture, the one they sent has modified part number and they told me to use 970M.

 

Extra power cable connected properly. I have tried to remove GPU and turn on laptop without GPU then fans starts spinning 100% ,orange light blinks for some time and then computer shuts off. With GPU installed it runs, but no display. I can only turn fans on to 100% with FN+1.

 

This is part i bought. https://www.aliexpress.com/item/Lap...7c23-43be-90d9-68ddb247ff82&priceBeautifyAB=0

This they sent me.

 

Looks fine to me. As long as your card is a Clevo one with the right vBIOS, you should be good. The board could be a dud, your memory could be causing it, or the GPU might be bad.

 

45 day warranty

Item listing makes no mention of requirement to use 970M

Raise a dispute, include the seller messages as evidence of contradiction with the listing ("100% test OK"), demand refund or replacement, and a reimbursement of postage if they want the broken one they sent you returned.

I wonder why there is no serial number on your motherboard. Maybe it failed QC at the factory? Those still can end up on the market

 

Thank you everyone for answers. I got reply from seller '' The first boot require 970M card and then i can use GTX980 in BIOS''
Is it possible?

 

No, there is no such limitation. A clear CMOS would have removed odd behaviour like that even if it existed.

 

Hi, if RAM would be problem then computer would beep and turn off? I wonder if there is a way to flash BIOS file to this motherboard? Do you know where BIOS chip is on this P870DM motherboard? I have usb programmer.

 

Bump, anyone can help to boot this thing up?

 

@wersuss I had a ram issue with the useless 32GB hyperx ram I bought from kingston, there are no beeps whatsoever screen remains blank and cpu fan slowly goes to 100%.

Is that happening to you, if so replace your ram and try again! Try using a single stick of 2400mhz ram or higher.

 

Ok, you have a usb programmer, that is good. The location of the bios chip is directly underneath the touchpad. You need to fully open up the laptop and take the motherboard out. Align the 8 pin clip so that the first red wire is directly next to the embedded dot on the bios chip.


Edit: I have the stock bios on my alienware 18, I can link it to you if you need it, let me know.

 

Thank you very much for this, i will try it out.

 

I have tried to flash BIOS , programmer detects chip and writes BIOS (8mbit) but the problem is still there, i suspect it's not so easy maybe need to flash EC aswell but i don't know how. Can it be display because mine is G-SYNC GTX980 and motherboard was used for gtx970m might be without G-SYNC?

 

Try reseating the cpu in the socket otherwise I think your motherboard maybe a dud. Highly unlikely that the ec chip will cause issues.

And your GPU should work in the motherboard anyway.

Try another GPU if possible? G-Sync lcd or not it doesn't matter. All that matters is that the GPU should have the ability to post to an edp screen.

 

Thank you. Well i can buy single 970M and try, or can i try 1070 from my Clevo P775DM3G? But would it work without extra power cable?

 

SHouldn't be the issue, you have a gsync panel and card.

 

The clevo card will NOT work in your laptop unless you do an mxm mod and power cable mod which I wouldn't recommend as you may need to return the board.

You might have to try a 970m in the rig. If it were up to me I would return the motherboard as I would be wasting extra money on buying a GPU Im not going to utlize if the mb was dead...

 

Thank you for answers, i will just buy new motherboard, or second P870DM-G without CPU, HDD and RAM from Ebay.

 

No need to buy a new p870dmg just buy a new motherboard. Ebay sell them for a decent price. You just need to look. I have personally not had an issue with aliexpress but they send different items to what is shown sometimes.

I wish you luck with you system and hope everything is resolved at the end. Then, if you like, check out the coffee lake mod @dsanke made for this laptop. It will futureproof it for years to come.

 

By the way that's what happened to original MB. Maybe i could replace that burnt part by desoldering?

 

This is really cool! Thanks! You have nice P870DM-G btw.

 

You could but I have a feeling that more than just a mofset has fried, that IC next to it may also be gone. If it is youll have to find the specific component again.

If you aren't going to return the new motherboard then you can transplant the parts from the new motherboard into the old motherboard.

You may have a shot at making it work.

 

Thank you, I spent a lot of time and money on this spec lol. I'm surprised it all worked in the end too.

 

If you plan to go through with the transplant (lol) I would advise a few things.

Im sure you have a heat gun, I would recommend putting the temp to around 350c and no higher as components on the other side WILL fall of at any higher heat.

Also use kapton tape (that yellow heat absorbing tape) on the keyboard connectors on the otherside if they are directly underneath the burnt mofset. You don't want a fixed motherboard and then a broken/melted keyboard connector from the result!

And if you can try and reball the IC if you take it off the new motherboard. It'll make very good contact with the original motherboard and therefore result in better connection.

Basically, you don't want the same thing happening again as a result.

 

Looking at the board I'd say it requires more than simply desoldering and replacement of the mosfet, pretty sure traces are burnt to a crisp. Look at the right of the mosfet, it's red.

 

If the inner layers are toasted the board is dead full stop.