DG424/DG524 NM-B301 Rev 1.0 no display and power issue

[kalilinux25]

Hi good day this unit has a display at first and after flashing the bios chip got broken the original one is W25q64fwsiq and changed with W25q64fwsiG
no idea if they are compatible after flashing unit wont power if pressed lightly, but if you tried long press it will power but no display , So I tried all bios in the forum same issue.

I take the board out , its taking 80miliamp and cpu is gettign hot but power led is not turning on

Unit is
DG424/DG524 NM-B301 REV 1.0
2017-03-09
SR2Z6 Intel Celeron N3450





Photo from power suppply







checking voltage from
PL3401- +VNN it has 1.0v

PL401 - 3.3V
PL402 - 5V
EC_RSMRST# 3.3V
EC_ON - 3.3V
VR_CPU_PWROK - 3.3V
ALW_PWRGD- 3.3V
EC_VR_ON - 3.3V
SUSP# -3.3V
PCH_PWR_EN - 3.3V
SYS_ON - 3.3V
PM_SLP_S3# - 3.3V
+1.8VS - 1.8V

1.8VALW_PG -3.8V (why?)

this reading is on UNIT IS PLUG and taking only 80 milliamp

[mon2]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

All of a sudden, the flash memory devices are becoming a hot topic.

The 2 flash memory devices are NOT the same.

The original has a 'Q' suffix. This means that the QE='1'. So QSPI mode is enabled.

The replacement is with a 'G' suffix. QE='0'.

To use the replacement, you must find a method to configure the QE bit to be '1'.

Do search for a compatible tool and share the details here. If there is a need, can develop one, as time permits.

Update:

Wish to clarify...there is an assumption on my part that the original chip is still onboard with QE='1'. The only way to confirm is to check the schematics.

That is, it is possible the mfr of the logic board used this part but only after changing QE='0'.

Then normal spi mode applies.

Do note this possibility.

If possible, test the replacement with and without QE='1' setting.

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

All of a sudden, the flash memory devices are becoming a hot topic.

The 2 flash memory devices are NOT the same.

The original has a 'Q' suffix. This means that the QE='1'. So QSPI mode is enabled.

The replacement is with a 'G' suffix. QE='0'.

To use the replacement, you must find a method to configure the QE bit to be '1'.

Do search for a compatible tool and share the details here. If there is a need, can develop one, as time permits.

Update:

Wish to clarify...there is an assumption on my part that the original chip is still onboard with QE='1'. The only way to confirm is to check the schematics.

That is, it is possible the mfr of the logic board used this part but only after changing QE='0'.

Then normal spi mode applies.

Do note this possibility.

If possible, test the replacement with and without QE='1' setting.

Thanks for the detailed and very clear clarrification sir, Not I udnerstand why its doing this type of issue , what Im gonan do now is jsut jumper the brroken ppins to the spi flasher hoping it will works without issue, Il update on this also




UPDATE it was just a bios chip issue,
beacuse the old one is broken I just soldered the broken pin to a jumpewr wires , now its fully working , thank you fior helping sir

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

https://www.badcaps.net/forum/showth...FDG524+NM-B301

this bios wroks on my board thanks

[mon2]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

Thanks for the update and closure.

Given that you went back to the original and all is working, reviewed the flash memory IC on this schematic.

See attached.

Based on the flash pin labels, very confident that the original flash chip is being deployed in QSPI mode. That is, QE='1' is required.

The part # from the original flash IC has the 'Q' so it is factory default in QSPI mode.

The replacement part was not (by default) and would not work here unless you manually enable the same QE bit to be a '1' using a programmer.

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

Thanks for the update and closure.

Given that you went back to the original and all is working, reviewed the flash memory IC on this schematic.

See attached.

Based on the flash pin labels, very confident that the original flash chip is being deployed in QSPI mode. That is, QE='1' is required.

The part # from the original flash IC has the 'Q' so it is factory default in QSPI mode.

The replacement part was not (by default) and would not work here unless you manually enable the same QE bit to be a '1' using a programmer.

Thank you sir for providing this data on me, very helpful to my future repairs thanks always

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

Thanks for the update and closure.

Given that you went back to the original and all is working, reviewed the flash memory IC on this schematic.

See attached.

Based on the flash pin labels, very confident that the original flash chip is being deployed in QSPI mode. That is, QE='1' is required.

The part # from the original flash IC has the 'Q' so it is factory default in QSPI mode.

The replacement part was not (by default) and would not work here unless you manually enable the same QE bit to be a '1' using a programmer.

Update sir , unit working not normal windows wont load , keeps loading screen windows. after resting the unit, it wont power agian taking 30miliamp , cpu not hotting up no response on the power switch, what are your suggestion sir?

[mcplslg123]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

What is the status of SUSP# ? IS it coming up??

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

What is the status of SUSP# ? IS it coming up??

Unit works again sir after trying a clean bios but Issue is stock on loading screen of windows , with or without SSD, its running on bootable usb only, Hope its not a EC bin issue.

[mon2]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

Try the safe mode boot of the windows os.

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

after flashing the board it will display and afther powering off the unit, it wont powered again

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

Try the safe mode boot of the windows os.

no unit dont have any ssd ,its just running on bootable usb sir

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

PL401 - 3.3V
PL402 - 5V
EC_RSMRST# 0v
EC_ON - 3.3V
VR_CPU_PWROK - 3.3V
ALW_PWRGD- 6.5V
EC_VR_ON - 3.3V
SUSP# -0v
PCH_PWR_EN - 3.3V
SYS_PWROK - 0v
PM_SLP_S3# - 0v

Unit is taking 30miliamp of power stable

+1.8VALW- 1.8V
EC_RTCRST#_ON- 4.2v
SYSON - 0V

LDO1_VIN -0V
LDO2_VIN -3.3V
PMIC_VCC -5.1V
+5VLP - 5.1V
ALW_PWRGD -3.8V -pulsing 5v

[mcplslg123]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

In my opinion a Bad or Dry balls under SOC. Perhaps the heat applied during desoldering/soldering bios chip is making temporary connections under SOC. Thats my gut feeling but may be something else.

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

In my opinion a Bad or Dry balls under SOC. Perhaps the heat applied during desoldering/soldering bios chip is making temporary connections under SOC. Thats my gut feeling but may be something else.

maybe Ill try to resolder the soc sir?

[mon2]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

EC_RSMRST# 0v

EC is parked in the reset mode if this signal is LOW = 0 volts.

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

EC_RSMRST# 0v

EC is parked in the reset mode if this signal is LOW = 0 volts.

that mens I have a bad Sio chip?

[mon2]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

If available, can you link or post the schematic?

No, the reset line will be an external signal created by an external group of parts.

Check if there is a RC (resistor capacitor) circuit on this line. It should start from 0 volts but rest at 3v3 to release this line and only then then the EC will start it's function. The EC is a stand alone 8051 microcontroller with its own firmware. If parked in reset mode, the EC is sitting idle.

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

If available, can you link or post the schematic?

No, the reset line will be an external signal created by an external group of parts.

Check if there is a RC (resistor capacitor) circuit on this line. It should start from 0 volts but rest at 3v3 to release this line and only then then the EC will start it's function. The EC is a stand alone 8051 microcontroller with its own firmware. If parked in reset mode, the EC is sitting idle.

Yes sir its avaialble.

https://www.badcaps.net/forum/showthread.php?t=77943
https://www.badcaps.net/forum/showthread.php?t=114458

[kalilinux25]

Re: DG424/DG524 NM-B301 Rev 1.0 no display and power issue

If available, can you link or post the schematic?

No, the reset line will be an external signal created by an external group of parts.

Check if there is a RC (resistor capacitor) circuit on this line. It should start from 0 volts but rest at 3v3 to release this line and only then then the EC will start it's function. The EC is a stand alone 8051 microcontroller with its own firmware. If parked in reset mode, the EC is sitting idle.

is this the right connection?