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... -
it was working yesterday, i opened it up and saw this mess. boardview and schematic uploaded for convenience.
PU200
pin 17 vreg5 = 0v ~ solder joint was corroded and flicked right off with my probe, was able to get clean and reflow, rest look fine.
pin 8 vreg3 = 0v
pin 13 en = .2v
pin 1,6 entrip1,2 = 0v
b+ and b++ = 19.5v
+5valw = 0v & 25+ohm to ground
+3valwp = 0v & 25+ohm to ground
i cleaned the board up just a little and can get more pics.
where should i be looking? thx... -
hellolaptop dell 3521 la-9104p no light on screen
i can see data ok but no backlight
on jlvds
NV_PWR_SRC 18 v is ok
3vs is ok 3.3
lcdvdd is ok 3.3
i replacd led screen
and change flata ( caple between board and led )
any idea... -
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.
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