Re: Asus X453SA No Display - Charging Indicator Blinking
i will try to change the value of those resistor
note:
default value-based on boardview:
R1 = 127k ohms
R2 = 20k ohms
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Last Activity: 04-15-2025, 10:17 AM
Joined: 08-22-2021
Location: East Nusa Tenggara, Kupang
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Re: Asus X453SA No Display - Charging Indicator Blinking
4k resistor is removed, measured ACDRV ~+1.3V
I will try another pair of mosfet and soruce a new charging ICLeave a comment:
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Re: Asus X453SA No Display - Charging Indicator Blinking
Greetings, today the parts arrived
Tried 2 charging IC and change the mosfets too
ACDRV measured around +1.3V. The 19v is not passing through the mosfets, even though i tried new mosfets..
I will update with mosfet measurementLeave a comment:
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Re: Asus X453SA No Display - Charging Indicator Blinking
Alright. Will update once the part comesLeave a comment:
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Re: Asus X453SA No Display - Charging Indicator Blinking
MOSFET 1
SOURCE TO DRAIN : 2.05M ohms
SOURCE TO GATE : 0.973M ohms
GATE TO DRAIN : 1.05M ohms
MOSFET 2
SOURCE TO DRAIN : 125.5k ohms
SOURCE TO GATE : 175.1k ohms
GATE TO DRAIN : 0.638M ohmsLeave a comment:
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Re: Asus X453SA No Display - Charging Indicator Blinking
ACDET +2.581V
ACOK +1.577V
mosfet measurement will be updatedLeave a comment:
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Re: Asus X453SA No Display - Charging Indicator Blinking
Update :
REGN +6.05V
ACDRV 0V
Already removed the 4.7k ohms resistor, laptop is not powering up
The resistor (off board) is measured around 3.9k ohmsLeave a comment:
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Re: Asus X453SA No Display - Charging Indicator Blinking
Update : this is my measured diode mode value, compared to repair guide...Leave a comment:
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Re: Asus X453SA No Display - Charging Indicator Blinking
Good morning from Indonesia. Currently I am measuring the diode value. Will update!Leave a comment:
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Re: Asus X453SA No Display - Charging Indicator Blinking
Hi too, mon2
1) the power adapter is rated for the laptop(19V-1.75A-33W)
2) The charger IC is BQ735, located near the battery socket. I also located both mosfets. Haven't done "deep dive" on charging IC and DC-in mosfet.
3) Alright, will do it in the afternoon. I will post the diode mode value comparison. Also, is there any max tolerance in diode mode reading?
Thank you for the heads up, i will update this thread later on.Leave a comment:
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Asus X453SA No Display - Charging Indicator Blinking
Greetings
I got an Asus X453SA for repair
Symptom : no display, with charging indicator blinking, with or without battery. Power indicator is steady. When battery plugged in, the current consumption jumps, but the charging indicator is still blinking.
Here is the measured power sequence :
+3VA_EC +3.3V
EC_RST# +3.025V
+5VSUS_ON +3.307V
PWR_SW# +2.982V
3VSUS_ON +3.307V
SUS_PWRGD +3.386V
+1.05VSUS_PWRGD +1.061V
1.8VSUS_EN +1.873V
VSUS_PWRGD +3.383V
PM_PWRBTN# +1.830V
PM_RSMRST#... -
Re: New Members - please post your introductions here
Greetings. My name is Kenneth. I do repair, especially in Laptop-Desktop. Also, I am still learning on Data Recovery. First time I got hooked into repair, is by my uncle. He is the one who guided me to this way. Nice to meet you guys!Leave a comment:
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