ea53-bm/eg52-bm mb 14222-1 no display

[kalilinux25]

Hi I have a board that no display I tried checking all coils no shorted I tested pin 1 pressing power , no response on my DSO checking the 25mhz crystal display no reading in pin1 and pin2 checking the X1802 pin 1 has a reading .

1 question if you have no reading on the cyrstal display those the part considered dead?

I tried chanign the ram but no display its taking 80milliamp

[stingerchamp]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Crystal gets power from rtc section

Rtc means real time clock

Rtc cell is the voltage provider battery 3.3 volts

First check rtc cell voltage in cold state

If ok

Second check ram section voltage

If ok

Then check pltrst# signal and crystal

To check crystal oscillator remove it from the board
And it should not beep or connected with each other pins ,just like you check capacitor

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Crystal gets power from rtc section

Rtc means real time clock

Rtc cell is the voltage provider battery 3.3 volts

First check rtc cell voltage in cold state

If ok

Second check ram section voltage

If ok

Then check pltrst# signal and crystal

To check crystal oscillator remove it from the board
And it should not beep or connected with each other pins ,just like you check capacitor

MY cell is ok. dmrst# has 600miliamp sorry I cant find the pltrst# on my diagram and I cant point it on my actual I dont have boardview

[stingerchamp]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Dramrst# same as e ram voltage

DDR3L 1.35
DDR4 1.2

You get 0 voltage at dramrst#?

Confirmed ram section issue or connected part

[stingerchamp]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Smile Ddr3/ddr4 ram section voltage requirements(working)
Follow this guide to verify voltage at RAM SECTION


DDR 3 ram section voltage check list at ram slot

DDR3 operating voltage VDD (at coil )= 1.5V PINs 75,76 ram slot

VRef_DQ = 0.75 V at PIN 1
VTT/Termination voltage= 0.75V PINs 203,204

VRef_CA. = 0.75V PIN 126
VDD SPD = 3.3V PIN 199
SDA data = 3.3V PIN 200
SCL clock = 3.3V PIN 202
DRAM_RST# = 1.5V PIN 30

±+++++++++++++++++++++++

DDR 3L ram section voltage check list at ram slot

DDR3L operating voltage VDD (at coil )= 1.35V PINs 75,76 ram slot

VRef_DQ = 0.67 V at PIN 1
VTT/Termination voltage= 0.67V PINs 203,204

VRef_CA. = 0.67V PIN 126
VDD SPD = 3.3V PIN 199
SDA data = 3.3V PIN 200
SCL clock = 3.3V PIN 202
DRAM_RST# = 1.35V PIN 30



±+++++++++++++++++++++++++++++


DDR4 ram section voltage check list at ram slot

DDR4 operating voltage VDD (at coil )= 1.2V PINs 12,33,75 of ram slot

VTT/Termination voltage= 0.6V PIN 258

VRef_CA. = 0.6V PIN 164
VDD SPD = 3.3V PIN 255
SDA data = 3.3V PIN 254
SCL clock = 3.3V PIN 253
DRAM_RST# = 1.2V PIN 108


In case of any mistake please notify

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Crystal gets power from rtc section

Rtc means real time clock

Rtc cell is the voltage provider battery 3.3 volts

First check rtc cell voltage in cold state

If ok

Second check ram section voltage

If ok

Then check pltrst# signal and crystal

To check crystal oscillator remove it from the board
And it should not beep or connected with each other pins ,just like you check capacitor

I tried to test signal on the PLTRST# on pin 19 of U3001
no good reading not stable

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

dramrst# same as e ram voltage

ddr3l 1.35
ddr4 1.2

you get 0 voltage at dramrst#?

Confirmed ram section issue or connected part

500 milliamp

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Smile Ddr3/ddr4 ram section voltage requirements(working)
Follow this guide to verify voltage at RAM SECTION


DDR 3 ram section voltage check list at ram slot

DDR3 operating voltage VDD (at coil )= 1.5V PINs 75,76 ram slot

VRef_DQ = 0.75 V at PIN 1
VTT/Termination voltage= 0.75V PINs 203,204

VRef_CA. = 0.75V PIN 126
VDD SPD = 3.3V PIN 199
SDA data = 3.3V PIN 200
SCL clock = 3.3V PIN 202
DRAM_RST# = 1.5V PIN 30

±+++++++++++++++++++++++

DDR 3L ram section voltage check list at ram slot

DDR3L operating voltage VDD (at coil )= 1.35V PINs 75,76 ram slot

VRef_DQ = 0.67 V at PIN 1
VTT/Termination voltage= 0.67V PINs 203,204

VRef_CA. = 0.67V PIN 126
VDD SPD = 3.3V PIN 199
SDA data = 3.3V PIN 200
SCL clock = 3.3V PIN 202
DRAM_RST# = 1.35V PIN 30



±+++++++++++++++++++++++++++++


DDR4 ram section voltage check list at ram slot

DDR4 operating voltage VDD (at coil )= 1.2V PINs 12,33,75 of ram slot

VTT/Termination voltage= 0.6V PIN 258

VRef_CA. = 0.6V PIN 164
VDD SPD = 3.3V PIN 255
SDA data = 3.3V PIN 254
SCL clock = 3.3V PIN 253
DRAM_RST# = 1.2V PIN 108


In case of any mistake please notify

i dont have voltage on my PL5001 sir

[stingerchamp]

Re: ea53-bm/eg52-bm mb 14222-1 no display

As per sequence diagram at end pages of schematic

Imvp pwrgood required for pu5001 and these are last stages but you said drmrst# is 0 which is an early stage

Check pin 30 of ram slot , your ram ic is RT8xxx

and pu5001 is PCH 1.05v switch ic

Follow the power sequence

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

As per sequence diagram at end pages of schematic

Imvp pwrgood required for pu5001 and these are last stages but you said drmrst# is 0 which is an early stage

Check pin 30 of ram slot , your ram ic is RT8xxx

and pu5001 is PCH 1.05v switch ic

Follow the power sequence

DDR3_DRAM_PWROK_D has 1.3v PM_SLP_S4# has 3.3v ive tested again the dmrst# no voltage readings sir

[stingerchamp]

Re: ea53-bm/eg52-bm mb 14222-1 no display

1D35V_S3_PWRGD check

Check slp_s4#_d coming out from q3613 at pin 6
Check slp_s3#

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

1D35V_S3_PWRGD check

Check slp_s4#_d coming out from q3613 at pin 6
Check slp_s3#

meery christmass sir Idont have any reading on pwrgd and s4# also slp_s3#

[stingerchamp]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Milliamp???

It is voltage ,
did you measure in volts

If ok

Slp_s3# not coming means

No rsmrst#, check rsmrst#

Need oscilloscope to check crystal ok or not

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Milliamp???

It is voltage ,
did you measure in volts

If ok

Slp_s3# not coming means

No rsmrst#, check rsmrst#

Need oscilloscope to check crystal ok or not

yes in voltage beore ching the pin 6 i tried to checki form the battery connector if I got votlage .

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Milliamp???

It is voltage ,
did you measure in volts

If ok

Slp_s3# not coming means

No rsmrst#, check rsmrst#

Need oscilloscope to check crystal ok or not

Sorry sir I forgot to tun it on, SLP_S3# is 3v reading rmst# 3.3v

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Milliamp???

It is voltage ,
did you measure in volts

If ok

Slp_s3# not coming means

No rsmrst#, check rsmrst#

Need oscilloscope to check crystal ok or not

can you help me again sir

[stingerchamp]

Re: ea53-bm/eg52-bm mb 14222-1 no display

1D35V_S3_PWRGD
Check imvp_pwrgood

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

1D35V_S3_PWRGD
Check imvp_pwrgood

1D35V_S3_PWRGD - 0v
Check imvp_pwrgood - 2v

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Q3613

pm_slp_s4# 3.3v
ddr3_dram_pwrok 0v
pm_slp_s4#_d 0v

[kalilinux25]

Re: ea53-bm/eg52-bm mb 14222-1 no display

Q3612
ddr3_vcca_pwrgd_3p3 - 0v
ddr3_vcca_pwrgd_g 3.3v
ddr3_vcca_pwrgd 0v