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Author Topic: B450 Tomahawk Fail to boot  (Read 1393 times)

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mrup80Topic starter

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B450 Tomahawk Fail to boot
« on: 14-April-19, 05:02:59 »

Hello,

I just bought my pc and assembled it, sadly it doesn't POST or open at all, sometimes the VGA EZ DEBUG led is on and other times it does not.

what i tried:
-tried clearing BIOS by shorting the CMOS pins, removing the battery for 30 mins
-tried Flash BIOS but it doesn't seem to work (the led is always on after 3 blinks)

SPECS:
B450 Tomahawk
2700X
Sapphire RX 590 SE
GSKILL FlareX 3200 CL14
Seasonic S12II 620W
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Re: B450 Tomahawk Fail to boot
« Reply #1 on: 14-April-19, 06:54:53 »

Can yozu try the graphics card in a different pc to check if it is working?
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mrup80Topic starter

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Re: B450 Tomahawk Fail to boot
« Reply #2 on: 14-April-19, 07:11:02 »

Can yozu try the graphics card in a different pc to check if it is working?
Will go and try it in a friend's pc
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rbleroy91

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Re: B450 Tomahawk Fail to boot
« Reply #3 on: 14-April-19, 08:12:18 »

Hello,
1/ When you power on CPU EZ DEBUG LED must light on 1s then light off. After that, DRAM EZ DEBUG LED must do the same, then VGA, then BOOT. If one of these LEDs remains on, there is a problem with the corresponding component and the post process stops. If there is a cycle between CPU and DRAM LEDs, there is a problem with the loaded bios.
2/ Have you done Flash BIOS Button following exactly that:
- Download >>Bios V1.50<<.
- Extract then copy the file "E7C02AMS.150" on the empty root of the USB pen (no more than 16GB and FAT32 (not FAT) partition).
- Rename "E7C02AMS.150" to "MSI.ROM".
- Power off.
- Verify that you PSU is gooldly connected to the mobo's CPU_PWR1 and ATX_PWR1 headers (using only cables furnished with the PSU).
- Plug the pen in the Flash BIOS Button port on the back panel:

- Power on and wait 5s.
- Press the Flash BIOS Button button on the back panel (see the previous figure).
   Does the Flash BIOS Button button's LED (+ USB pen light if there is) flash
   (you could have to wait around 2mn after to have pressed the button
)?
     . If definitvely not, try with another USB pen because Flash BIOS Button seems to not recognize some model (I don't know why).
     . If yes, be patient because load process can run around 10mn.
- If Flash BIOS Button has goodly ended, power off PSU, unplug the power cord and wait 10s after all mobo's leds light off.
3/ If Flash BIOS Button did not work, maybe the loaded bios is V1.70. AMD (not MSI) refuses any downgrade and even Flash BIOS Button cannot downgrade (it is the first time I see that!). Therefore, rety all #2 but, this time, with >>Bios V1.70<< (E7C02AMS.170).
Hoping it shall help,
:hat tip:
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mrup80Topic starter

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Re: B450 Tomahawk Fail to boot
« Reply #4 on: 14-April-19, 18:34:34 »

Can yozu try the graphics card in a different pc to check if it is working?

tried the GPU at a friend's, it is working properly
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mrup80Topic starter

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Re: B450 Tomahawk Fail to boot
« Reply #5 on: 14-April-19, 18:40:26 »

Hello,
1/ When you power on CPU EZ DEBUG LED must light on 1s then light off. After that, DRAM EZ DEBUG LED must do the same, then VGA, then BOOT. If one of these LEDs remains on, there is a problem with the corresponding component and the post process stops. If there is a cycle between CPU and DRAM LEDs, there is a problem with the loaded bios.
2/ Have you done Flash BIOS Button following exactly that:
- Download >>Bios V1.50<<.
- Extract then copy the file "E7C02AMS.150" on the empty root of the USB pen (no more than 16GB and FAT32 (not FAT) partition).
- Rename "E7C02AMS.150" to "MSI.ROM".
- Power off.
- Verify that you PSU is gooldly connected to the mobo's CPU_PWR1 and ATX_PWR1 headers (using only cables furnished with the PSU).
- Plug the pen in the Flash BIOS Button port on the back panel:
[ ERROR: SPECIFIED ATTACHMENT MISSING ]
- Power on and wait 5s.
- Press the Flash BIOS Button button on the back panel (see the previous figure).
   Does the Flash BIOS Button button's LED (+ USB pen light if there is) flash
   (you could have to wait around 2mn after to have pressed the button
)?
     . If definitvely not, try with another USB pen because Flash BIOS Button seems to not recognize some model (I don't know why).
     . If yes, be patient because load process can run around 10mn.
- If Flash BIOS Button has goodly ended, power off PSU, unplug the power cord and wait 10s after all mobo's leds light off.
3/ If Flash BIOS Button did not work, maybe the loaded bios is V1.70. AMD (not MSI) refuses any downgrade and even Flash BIOS Button cannot downgrade (it is the first time I see that!). Therefore, rety all #2 but, this time, with >>Bios V1.70<< (E7C02AMS.170).
Hoping it shall help,
:hat tip:
-I did try to Flash BIOS with the V1.50 it failed (two blinks and constant ON)
-I went with the V1.70 and It kept blinking but it took less than 10 mins but the PC automatically restarted 
-The POST sequence goes by: CPU led turns on for 1s but the DRAM does not, then directly the VGA is always on 
-I did try to start with no ram installed to check if the led is working and it is 
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rbleroy91

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Re: B450 Tomahawk Fail to boot
« Reply #6 on: 15-April-19, 02:03:38 »

Hello,
Quote
-I did try to Flash BIOS with the V1.50 it failed (two blinks and constant ON)
-I went with the V1.70 and It kept blinking but it took less than 10 mins but the PC automatically restarted
That explains why Flash BIOS Button with V1.50 did not work: your mobo was furnished with bios V1.70 loaded and AMD (not MSI) refuses any downgrade from V1.70 so that you cannot do it with M-Flash; even Flash BIOS Button cannot (it is the firts time I see that!)! :undecided:

Unfortunately, V1.70, who adds no more than "support new upcoming AMD CPU", is buggy for current CPUs! :angryfire: 
Do that:
- Move the RX590 in PCI_E4.
- Do a clear CMOS:
  . Power off PSU, unplug the power cord and wait that all mobo's leds light off.
  . Either
      . short JBAT1 during at least 20s
        (if you have not a jumper cap, use something like a screwdriver but be cautious to touch only the 2 pins of JBAT1) or
      . remove the battery cell during 15mn.
  . Plug the power cord and power on.
  . If you have dispaly, you would see a message. Choose to use bios default values.
- If you have now display, you are saved because you can downgrade, not with M-FLash or Flash BIOS Button (I repeat, AMD refuses) but with a tool developped by one forum's administrator: >>Flash tool[1.06] for MSI UEFI BIOS<< is able to do it. Use it to downgrade to >>Bios V1.50<< (E7C02AMS.150). It is a reliable tool developped by one forum's administrator and it saved many users.
- After that, you would be able to use the RX590 plugged in PCI_E1.
Good luck,
:hat tip:
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mrup80Topic starter

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Re: B450 Tomahawk Fail to boot
« Reply #7 on: 15-April-19, 09:51:33 »

Hello,That explains why Flash BIOS Button with V1.50 did not work: your mobo was furnished with bios V1.70 loaded and AMD (not MSI) refuses any downgrade from V1.70 so that you cannot do it with M-Flash; even Flash BIOS Button cannot (it is the firts time I see that!)! :undecided:

Unfortunately, V1.70, who adds no more than "support new upcoming AMD CPU", is buggy for current CPUs! :angryfire:
Do that:
- Move the RX590 in PCI_E4.
- Do a clear CMOS:
  . Power off PSU, unplug the power cord and wait that all mobo's leds light off.
  . Either
      . short JBAT1 during at least 20s
        (if you have not a jumper cap, use something like a screwdriver but be cautious to touch only the 2 pins of JBAT1) or
      . remove the battery cell during 15mn.
  . Plug the power cord and power on.
  . If you have dispaly, you would see a message. Choose to use bios default values.
- If you have now display, you are saved because you can downgrade, not with M-FLash or Flash BIOS Button (I repeat, AMD refuses) but with a tool developped by one forum's administrator: >>Flash tool[1.06] for MSI UEFI BIOS<< is able to do it. Use it to downgrade to >>Bios V1.50<< (E7C02AMS.150). It is a reliable tool developped by one forum's administrator and it saved many users.
- After that, you would be able to use the RX590 plugged in PCI_E1.
Good luck,
:hat tip:
I did try to install the GPU in PCIe4 slot, gives same problem.
Sadly impulsive me did shorten the CMOS pins while the pc was on and it shutdown instantly when i did.
can that brick the motherboard? it is still gives the same error (VGA DEBUG LED).
tomorrow I will get my friends GPU to try it.
Thanks for the fast response!
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rbleroy91

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Re: B450 Tomahawk Fail to boot
« Reply #8 on: 15-April-19, 09:54:32 »

tomorrow I will get my friends GPU to try it.
Ok, I cross fingers!
:hat tip:
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mrup80Topic starter

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Re: B450 Tomahawk Fail to boot
« Reply #9 on: 16-April-19, 03:34:23 »

Ok, I cross fingers! :hat tip:

Hello again, 

I got a couple of GPUs from my friend to try, Both gave the same problem, i also tried them into the other PCIe4 slot.
Did the shorting of the pins harm the motherboard?if so what can i do about it?
Thanks.
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Marked as best answer by mrup80 on 22-April-19, 08:17:17

rbleroy91

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Re: B450 Tomahawk Fail to boot
« Reply #10 on: 16-April-19, 16:42:37 »

Did the shorting of the pins harm the motherboard?
I want to believe that it did not!...
1/ What is the monitor model (not a TV)?
2/ Please, do the first part of that: >>AM4 Troubleshooting/FAQ thread<<.
3/ Would you obtain another PSU to retry (but use only cables furnished with each PSU)?
4/ Can you borrow a CPU with a buit'in GPU (see >>Here<<)? If yes, unplug the PCIe graphic card and connect the monitor to the mobo back panel.
If nothing work, unfortunately, I think your only remaining option is to RMA the mobo...
Good luck,
:hat tip:
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mrup80Topic starter

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Re: B450 Tomahawk Fail to boot
« Reply #11 on: 16-April-19, 22:56:59 »

I want to believe that it did not!...
1/ What is the monitor model (not a TV)?
2/ Please, do the first part of that: >>AM4 Troubleshooting/FAQ thread<<.
3/ Would you obtain another PSU to retry (but use only cables furnished with each PSU)?
4/ Can you borrow a CPU with a buit'in GPU (see >>Here<<)? If yes, unplug the PCIe graphic card and connect the monitor to the mobo back panel.
If nothing work, unfortunately, I think your only remaining option is to RMA the mobo...
Good luck,
:hat tip:
1/It is a PC monitor, and working on my friend's PC 
2/I did exactly as the first part of it, still having the same problem
3/I also did try that
4/unfortunately i don't know any friend that have an AMD CPU with integrated graphics 
I will go to a local shop to try if one if i can.

if not, I think I will contact (Newegg) but their support is really bad.
Thanks for your time!
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rbleroy91

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Re: B450 Tomahawk Fail to boot
« Reply #12 on: 17-April-19, 01:50:00 »

4/unfortunately i don't know any friend that have an AMD CPU with integrated graphics
I will go to a local shop to try if one if i can.
Ok, let me known.
Good luck,
:hat tip:
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mrup80Topic starter

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Re: B450 Tomahawk Fail to boot
« Reply #13 on: 22-April-19, 06:20:28 »

Well, it was the CPU after all (2700X) 
the EZ DEBUG VGA LED just wasted a lot of my time. 
Thank you @rbleroy91 for your help an time!
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rbleroy91

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Re: B450 Tomahawk Fail to boot
« Reply #14 on: 22-April-19, 07:03:47 »

Well, it was the CPU after all (2700X)
Good news, culprit is now known! :pompom:
Happy for you.
Friendly yours,
:hat tip:
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