acer nitro 5 AN515-55 no display / caps lock

[welcometoo]

Hi brothers, please i need help diagnose acer nitro 5 no display issue.

model: nitro 5 an515-55
motherboard part number: GH51M LA-K862P Rev: 1A

i received this laptop with a short in power line, it was a capacitor + a mosfet on VCORE line , the laptop turned on cpu and gpu getting warm all voltages seem ok except vcc_gt but no display/caps lock activity also no hdmi out.
i flashed new bios also ec(ene kb9022) the same result .
disabled discrete graphics (rtx 3060 ) by cutting its power and shifting a resisror near pch VCC_GT comes but still the same problem no display/caps lock activity.

i programed a pico with this program and soldered it to ec lpc bus lines to read post codes it give me these codes :

i plug the adapter first time and hit power :

...
	
	data: 7f
	
	data: 76
	
	data: 03
	
	data: 23
	
	data: 00
	
	data: 7f
	
	data: 00
	
	data: 0f
	
	data: 00
	
	data: 02
	
	data: 7f
	
	data: 00
	
	data: 00
	
	data: 0f
	
	data: 03
	
	data: 23
	
	data: 48
	
	data: 49
	
	data: 4a
	
	data: 4d
	
	data: 15
	
	data: 52
	
	data: 55
	
	data: 20
	
	data: 2f
	
	data: 3f
	
	data: 4f
	
	data: 0a
	
	...
	
	...
	
	data: 13 (laptop restarts here )
	
	
	...
	
	...
	
	...
	
	...
	
	...
	(when adapter plugged before it starts here )
	
	data: 7f
	
	data: 76
	
	data: 03
	
	data: 23
	
	data: 00
	
	data: 7f
	
	data: 00
	
	data: 0f
	
	data: 00
	
	data: 02
	
	data: 7f
	
	data: 00
	
	data: 00
	
	data: 0f
	
	data: 03
	
	data: 23
	
	data: 48
	
	data: 49
	
	data: 4a
	
	data: 4d
	
	data: 15
	
	data: 52
	
	data: 55
	
	data: 20
	
	data: 2f
	
	data: 3f
	
	data: 4f
	
	data: 0a
	
	data: 14
	
	data: 5f
	
	data: 26
	
	data: 6f
	
	data: 00
	
	data: 06
	
	data: 08
	
	data: 0a
	
	data: 10
	
	data: 1f
	
	data: 20
	
	data: 30
	
	data: 40
	
	data: 42
	
	data: 44
	
	data: 50
	
	data: 51
	
	data: 52
	
	data: 7f
	
	data: 00
	
	data: 1e
	
	data: 20
	
	data: 21
	
	data: 22
	
	data: 23
	
	data: 24
	
	data: 26
	
	data: 27
	
	data: 29
	
	data: 4c
	
	data: 2b
	
	data: 2a
	
	data: 2c
	
	data: 31
	
	data: 2e
	
	data: 4b
	
	data: 34
	
	data: 2f
	
	data: 3d
	
	data: 3e
	
	...
	
	data: 3a
	
	data: 4f
	
	...
	
	...
	
	...
	
	...
	
	...
	
	data: 4e
	
	...
	
	...
	
	...
	
	...
	
	...
	
	data: 53
	
	data: 49
	
	data: 46
	
	data: 32
	
	...
	
	data: 35
	
	data: 45
	
	...
	
	data: 36
	
	data: 37
	
	data: 41
	
	data: 4d
	
	data: 3f
	
	data: 40
	
	...
	​
	data: 3b
	
	data: 3c
	
	data: 38
	
	data: 39
	
	data: 49
	
	data: 48
	
	data: 51
	
	data: 50
	
	data: 42
	
	data: 72
	
	data: 5b
	
	data: 5c
	
	data: 61
	
	data: 60
	
	data: 5d
	
	data: 69
	
	data: 01
	
	data: 50
	
	data: 21
	
	data: 55
	
	data: 7f
	
	data: 00
	​
	data: 7f
	
	data: 00
	
	data: 00
	
	data: 7f
	
	data: 00
	
	data: 09
	
	data: 83
	
	data: 00
	
	data: 00
	
	data: 09
	
	...
	
	data: 02
	
	data: 22
	
	data: 00
	
	data: 04
	
	data: 05
	
	data: 06
	
	data: 08
	
	data: 0a
	
	data: 0b
	
	data: 0c
	
	data: 0d
	
	data: 07
	
	data: 0e
	​
	data: 13
	
	data: 14
	
	data: 15
	
	data: 7f
	
	data: 00
	
	data: 01
	
	data: 14
	
	data: 16
	
	data: 20
	
	data: 23
	
	data: 24
	
	data: 32
	
	data: 4f
	
	data: 50
	
	data: 5f
	
	data: 15
	
	data: 16
	
	data: 17
	
	data: 18
	
	data: 19
	
	data: 20
	
	data: 20
	
	data: 21
	​
	data: 22
	
	data: 23
	
	data: 24
	
	data: 25
	
	data: 28
	
	data: 3f
	
	data: 40
	
	data: 41
	
	data: 42
	
	data: 43
	
	data: 44
	
	data: 4f
	
	data: 40
	
	data: 41
	
	data: 42
	
	data: 47
	
	data: 61
	
	data: 63
	
	data: 03
	
	data: 65
	
	data: 64
	
	data: 6f
	
	data: 0f
	
	data: 6a
	
	data: 71
	
	data: 7f

(nothing more)

please can you help me where the problem is .

[Ponto da Manutenção]

Open the (JPH1).

The issue of caps lock, does it turn on or not?

Post the firmware backup and SNID?

Wouldn't it be interesting for you to monitor the communication data (LPC_FRAME#) etc. with a (Logic Analyzer)?

"by cutting its power and shifting a resisror near pch VCC_GT comes but still the same problem no display/caps lock"

[welcometoo]

Open the (JPH1).

The issue of caps lock, does it turn on or not?

Post the firmware backup and SNID?

Wouldn't it be interesting for you to monitor the communication data (LPC_FRAME#) etc. with a (Logic Analyzer)?

"by cutting its power and shifting a resisror near pch VCC_GT comes but still the same problem no display/caps lock"

hi bro thanks for reply
what i mean by caps lock not working that the system is not on a working state because if the display problem is related to the lcd pannel if you press caps lock the indicator led will toggle
i tried to disable nvidia gpu to see if the problem is related to egpu , but i got the same result no mater the case (with egpu enabled or disabled no display)
and for logic analyzer unfortunately i don't have one .
i don't have a serial number nor a snid because the label is damaged i have original bios dump , also i tried clean bios from acer support

[Ponto da Manutenção]

Your EC model is programmable (KB9022).

Would it be interesting if you could post your original backups, so that other forum members can analyze them...?

I'll post the firmware based on the model, since you don't have the SNID.
----------------------------------------------------------------------------------------
Check...

DDR_DRAMRST#_R
+0.6V_DDR_VREFCA
+0.6V_VREFCA
D_CK_SDATA
D_CK_SCLK
----------------------------------------------
CPU_DISPA_BCLK_R
CPU_DISPA_SDO_R
CPU_DISPA_SDI_R
------------------------------------------------
PCH_RTCRST#
PCH_PWROK
EC_RSMRST#
--------------------------------------------------
PCH_SMBALERT#
PCH_SML0ALERT#
PCH_SML1ALERT

[welcometoo]

this is my original dump + dumps created from acer support binary

[SMDFlea]

Your EC model is programmable (KB9022).
Would it be interesting if you could post your original backups, so that other forum members can analyze them...?

this is my original dump + dumps created from acer support binary

Reminder: rules and organization of this section
https://www.badcaps.net/forum/troubl...f-this-section

If you request/offer BIOS/schematics/boardviews, please post in the appropriate subsection, and you can link to it in the troubleshooting topic.


In the "BIOS Requests ONLY!" subsection go:

• Requests for BIOS or other firmware
• Requests for password unlock
• Offers for BIOS or other firmware

[welcometoo]

Reminder: rules and organization of this section
https://www.badcaps.net/forum/troubl...f-this-section

If you request/offer BIOS/schematics/boardviews, please post in the appropriate subsection, and you can link to it in the troubleshooting topic.


In the "BIOS Requests ONLY!" subsection go:

• Requests for BIOS or other firmware
• Requests for password unlock
• Offers for BIOS or other firmware

sorry i missed that

[welcometoo]

Your EC model is programmable (KB9022).

Would it be interesting if you could post your original backups, so that other forum members can analyze them...?

I'll post the firmware based on the model, since you don't have the SNID.
----------------------------------------------------------------------------------------
Check...

DDR_DRAMRST#_R
+0.6V_DDR_VREFCA
+0.6V_VREFCA
D_CK_SDATA
D_CK_SCLK
----------------------------------------------
CPU_DISPA_BCLK_R
CPU_DISPA_SDO_R
CPU_DISPA_SDI_R
------------------------------------------------
PCH_RTCRST#
PCH_PWROK
EC_RSMRST#
--------------------------------------------------
PCH_SMBALERT#
PCH_SML0ALERT#
PCH_SML1ALERT

i will test and tell you my friend
for my bios dump i posted it here:
https://www.badcaps.net/forum/troubl...07#post3676807

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