Re: Bios dump for Dell Vostro 3900
Thank you for the file. Unfortunately it didn't help no display problem. The fan is blowing at high speed, and CPU not warming....
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Re: Bios dump for Dell Vostro 3900
Service tag : FKGXQ52
NB : I downloaded 2 bios.exe files from Dell support and found that the .bin files extracted were quite different from the original backup file....
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Bios dump for Dell Vostro 3900
Need Bios dump for Dell Vostro 3900 -MB : MIH81R GREAT BEAR 13040-1M
with no display. Attached Old dump. Thank you...
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Bios dump for Dell Vostro 3900
Need Bios dump for Dell Vostro 3900 -MB : MIH81R GREAT BEAR 13040-1M
with no display. Attached Old dump. Thank you...
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Re: Reflashing Dell E7470 AAZ60 LA-C461P Rev1.0(A00)
First thank you for your continuous help. Unfortunately got no display though all voltages including CPU voltages are ok for seconds then laptop shuts down....
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Re: Reflashing Dell E7470 AAZ60 LA-C461P Rev1.0(A00)
Unfortunately, this version gave no ram voltage, so no display....
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Re: Reflashing Dell E7470 AAZ60 LA-C461P Rev1.0(A00)
First, thanks for your submission. Tried dump, but unfortunately no display.
Is there any way to fix the attached working dump with no wifi detection ?...
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Re: Reflashing Dell E7470 AAZ60 LA-C461P Rev1.0(A00)
Thanks for your prompt help. Unfortunately, got no display though all voltages are ok. CPU voltages appear for seconds and then laptop is off....Last edited by kamel; 04-16-2023, 04:27 PM.
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Reflashing Dell E7470 AAZ60 LA-C461P Rev1.0(A00)
On start fan spins but no video. All voltages are Ok
After reflashing bios, display came but wifi card not detected.
Tried another wifi card, same issue. Used different dumps, always no display.
Please help fixing the original dump or the one with wifi card issue.
Thank you
[ATTACH]296976[/ATTACH]
[ATTACH]296977[/ATTACH]Reflashing Dell E7470 AAZ60 LA-C461P Rev1.0(A00)
On start fan spins but no video. All voltages are Ok
After reflashing...
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Re: Dell D430-JAU00 LA-3741P fan&display failing
Well, I can confirm now that's a problem of initializing removed onboard RAM, because after assembling laptop, I noticed that 2 leds were constantly blinking once switched on (Memory fail).
Thank you.
Laptop was returned to customer. Thread is to be considered closed....
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Re: Dell D430-JAU00 LA-3741P fan&display failing
Yes, I agree with you, but as far as I understand, the 3 DDR2 (2 on board and 1 SODIMM SLOT1) are supplied[COLOR="Black"] in parallel[/COLOR] with same voltages and signals, so removing the 2 onboard DDR2 and using only the SODIMM slot 1 DDR2 should be ok. The GMCH will deal with the existing Ram. Please correct.Re: Dell D430-JAU00 LA-3741P fan&display failing
Yes, I agree with you, but as far as I understand, the 3 DDR2 (2 on board and 1 SODIMM SLOT1) are supplied[COLOR="Black"]...
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Re: Dell D430-JAU00 LA-3741P fan&display failing
Thanks for your follow up.
As explained, fan is not spinning and no display.
I add, when switched on, led lights for 45" and then off. All main voltages including cpu are correct.
Though, I shunted pin1 of JFAN1 "+FAN1_VOUT" directly to 3.3v run voltage, power led always went off after 45"....Last edited by kamel; 07-11-2020, 04:14 PM.
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Re: Dell D430-JAU00 LA-3741P fan&display failing
First, Thanks for your quick follow up.
I mean fan is not spinning and there is no display.
P.s also confirm : Found Pin29- HW_LOCK# = 0V. Is it "Hardware lock" signal ? and if so, shouldn't it be high level i.e +3.3V ?...Last edited by kamel; 07-11-2020, 04:00 PM.
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Dell_D430_LA-3741p- FAN AND THERMAL SENSOR-EMC4000
Dell_D430_LA-3741p- FAN AND THERMAL SENSOR-EMC4000...Last edited by SMDFlea; 09-18-2023, 03:33 AM.
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Dell D430-JAU00 LA-3741P fan&display failing
Hello! Need urgent help P.S !
Fixed initially a short on memory bus +1.8V rail by removing on board cells getting hot one by one, till last cell.
Inserted a DDR2 in SODIMM slot1.
Switched lap, all main voltages are ok, but fan and display are failing.
Voltages measured on FAN & Thermal Sensor IC "EMC4000" are attached.
Issues found :
Pin6- FAN_OUT : 0V ?? no spinning.
Pin30- THERMTRIP_SIO : 0V low, I guess, it should be high i.e +3.3V p.s correct.
Pin29- HW_LOCK# : 0V. Is it Hardware lock signal ? Should it be high level...Last edited by SMDFlea; 09-18-2023, 03:34 AM.
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Re: need identify Q655 burned smd fet
Hi
Urgent help needed for my previous post!
Thank you
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need identify Q655 burned smd fet
Hi
Brought for repair a dead Hp2105 monitor.
Found damaged : fuse F601 +cap C605 + Q651 +R670 +Q655
Need monitor schematic or diagram of the Power supply card 4H.L1S02.A20 to help identify the burned Q655 fet.
Thank you
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Re: Need advice from experts for a cmos battery replacement
I wish to thank every contributor.
Problem was solved by soldering a 3V Li-Manganese dioxide battery 1200A instead of the 3V-950mah with PCB solder tags, and gluing the battery to the mobo for better security.
Please note that the initial issue was my oscilloscope refused to turn on : it always went to sleep mode, when switched on. Replacing the cmos battery solved the issue. This might help others having same problem.
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