Hi i am having problem on Dell 3521 is giving 7 beeps and no +VCC_CORE and +VCC_GFX_CORE_AXG. Did anyone having same experience. I found a video it says to correct 7 beeps to flash ec controller. Is it will help me ? actually i don't have ec programmer. i have only TL866cs.
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Re: Dell 3521 with 7 Beeps
i replaced PU700 ISL95833HRTZ-T chip also. nothing changed. -
Re: Dell 3521 with 7 Beeps
I think either the onboard processor has failed or PCH failure.Comment
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Re: Dell 3521 with 7 Beeps
Reball the processor. If no change will be happened, then replace it. Your problem will be solved.Comment
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Re: Dell 3521 with 7 Beeps
flash the two bios one is near pch 25q16 and other side have 25q32 flashComment
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Re: Dell 3521 with 7 Beeps
Once I have solved 7 beeps with just heating cpu, reball is not necesary.Comment
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Re: Dell 3521 with 7 Beeps
I reflow to CPU and PCH Nothing changed. Also I flashed both bios 25q16 and 25q32 but no use. i try to inject +VCC_CORE by +0.91V its not shorted. So i thing the cpu not shorted. Now i have only one think to do it, that is reprogram the io chip ( KB1902 )Comment
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My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?
Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?
My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
I have tried multiple different Dell power adapters. My Dell... -
Model: Dell Latitude 3440
Board id: DL340-HSW MB 13221-1 Rev: A00
Laptop produce 2 beeps. RAM is ok (replace and test). And i think RAM Slot is also ok. Board have 2 RAM Slots. All coils have voltage expect PL5101. DRAMRST has only 0.12V. BIOS flashing can't solve the problem. Need help.
PL4503 - 3.3V
PL4101 - 5V
PL4902 - 1.35V
PL4801 - 1V
PL4701 - 1.7V
PL4401 - 17V
PL5101 - 0V
PU5102 pins -
Pin 1 - not stable ( 0.5, 1.3, 5.9 etc ... )
Pin 2, 4 - 0V
Pin 3 - 0.95V
Pin 5 - 2.87V
Pin 6 -... -
Motherboard - VAW00 LA-9104P
Rev:1.0(A00)
Board power on with 7 beeps
No Display
I checked All voltages
+VCC_CORE not present.
I changed PU700, Reprogram Bios but still same.
Anyone can give help to repair this. -
Dell Inspiron 3521 15" Laptop Schematic & Board View...
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I would like to share my experience about charging issues with Dell power supplies with the tech community. I am working on a Dell Inspiron 5590, Mainboard 18778-1 with charging problems. The device can be switched on and works so far, only the message appears at startup:
Alert! The AC power adapter wattage and Type cannot be determined. The battery may not change. The System will adjust the performace to match the power available.
The power supply unit is not recognized in the Bios and the charging process is set to "idle". I use original Dell battery, type...
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