vtfe
Member
Last Activity: 05-08-2023, 03:48 PM
Joined: 09-11-2017
Location: Bordeaux
-
ASUS N73JQ N73SV REV 1.0
I know this thread is old but in case someone is still looking for the schematics, here is Asus N73JQ schematics (attached).... -
Re: Dell E5550 (LA-A911P Rev 1.0) - strange behavior
I have 19V on PQ700 pin 4 when BIOS battery is inserted. But then power button shows no sign of life.
If no BIOS battery is plugged in, I have 0V on PQ700 pin 4. But power button led will light when pressed.
PD3 without BIOS battery: Pin 1, 3.13V // Pin 2, 0.08V // Pin 3, 3.30V
PD3 with BIOS battery: Pin 1, 3.13V // Pin 2, 2.97V // Pin 3, 3.30V
PQ700 pins 1 8 & 4 with power removed: multimeter reads "open line"
Just to be sure,... -
Re: Dell E5550 (LA-A911P Rev 1.0) - strange behavior
OK, I have tested PQ700 pin 4 again.
With [B]CMOS battery plugged in[/B]-> [B]19.03V[/B] (the "original" battery, which is 2.72V)
[B]No CMOS battery[/B] -> [B]0V[/B]
I tried with [B]another CMOS battery[/B] (2.96V) plugged in but pin 4 -> [B]0V[/B] (???)
Another strange thing is that the power button only reacts when there is no CMOS battery at all or the 2.96V battery is plugged in.[LIST][*]When mains is plugged the button led turns on briefly.[*]A push on the button will...Leave a comment:
-
Re: Dell E5550 (LA-A911P Rev 1.0) - strange behavior
Hello Techtiger,
I have looked for pictures of the motherboard and the coils are present on a factory motherboard (see picture attached). I definitely think they are missing on my motherboard. Having said that, I have no idea if the missing coils are responsible for the motherboard failure.
The USB port with the missing coils is the only one that will turn on a lamp led steadily. On the other two USB ports the lamp will only flash for a split second when charger is plugged in.
I suspect there is something...Leave a comment:
-
Re: Dell E5550 (LA-A911P Rev 1.0) - strange behavior
Merci, Techtiger!
I have had a close look at the mobo. [B]2 chips are missing[/B] in LI5 and LI6 (see pictures attached).
According to the Schematics (attached) the parts are DLW21HN900HQ2L_4P.
They are [B]Chip Common Mode Choke Coils[/B] (datasheet is attached).
I have no idea what these chips are (lol). Instead of replacing them, can I possibly bridge pads, just to see if the motherboard will boot?Re: Dell E5550 (LA-A911P Rev 1.0) - strange behavior
Merci,...Leave a comment:
-
Re: Dell E5550 (LA-A911P Rev 1.0) - strange behavior
Now does anybody know what could be wrong with the motherboard?
Extra info: I have tested the CMOS battery when it is plugged into the motherboard - multimeter indicates 2.7V only.Leave a comment:
-
Re: Dell E5550 (LA-A911P Rev 1.0) - strange behavior
Now does anybody know what could be wrong with the motherboard?Leave a comment:
-
Re: Dell E5550 (LA-A911P Rev 1.0) - strange behavior
Thanks, Mazorca!Leave a comment:
-
Dell E5550 (LA-A911P Rev 1.0) - strange behavior
Hello,
I have a Dell Latitude E5550. I don't know the history of the PC. The battery is missing. BTW I am not too sure the laptop will boot at all with mains but without a battery. Can someone confirm this laptop can boot without a battery attached?
At the moment, here is the behavior:
If I plug the charger and I have a USB led lamp plugged in, the lamp turns on steady (Happens with only one USB port out of 3). When I press the power button, nothing happens. USB lamp stays on, but nothing happens.
If I unplug the CMOS 3V battery, the lamp in... -
Re: Toshiba c660d PSC20E-00U001Y4 bios need
As others here, I flashed my Toshiba with wrong BIOS version. C660D-14C. I was stupid enough to flash with a BIOS from the Toshiba website for a slightly different model (C660D-14V vs. 14C). Restarted to a blank screen
Reflashed with the UMA BIOS version from Ala Borbe. Worked like a charm! Thank you, bro
@ Krist: I don't know if you can flash with a USB stick. I reflashed with a CH341a programmer. Google it or PM me if you need more info.Leave a comment:
-
Re: Need Main + EC BIOS for HP 820 G1 (6050A2630701-MB-A01)
Thanks again for your help, but it didn't work. There must be a short on the motherboard. I give up on this board.Leave a comment:
-
Re: Need Main + EC BIOS for HP 820 G1 (6050A2630701-MB-A01)
Thanks!
I will let you knowLeave a comment:
-
Re: Need Main + EC BIOS for HP 820 G1 (6050A2630701-MB-A01)
Here are the BIOSes I dumped from the PC:
- Main BIOS (16MB)
- EC BIOS (2MB)
Please find them attached....Leave a comment:
-
Need Main + EC BIOS for HP 820 G1 (6050A2630701-MB-A01)
Hello,
I need to flash main and ec bios for HP 820 G1 (for chips U365 and U366). Please provide both BIOS files.
Thank you
Symptom:
Laptop does not boot. When battery or power is plugged in:
- Fan spins fast for a few seconds then stops
- Power button led is steady white
- Caps lock led is steady white
- Front white led is steady and amber led blinks repeatedly
- CPU heatsink is VERY hot to the touch
- Blank screen (no backlight,...Leave a comment:
-
Re: Acer aspire es1-512
Thank you.
Worked for an Aspire ES1-512 that was stuck in a bootloop, blue led, no backlight.
[B]How do you fix the UUID though?[/B]Re: Acer aspire es1-512
Thank you.
Worked for an Aspire ES1-512 that was stuck in a bootloop, blue led, no backlight.
[B]How do you fix the UUID though?[/B]Leave a comment:
-
Re: PLF/PLR/CSF/CSR DCS MB REV-2.1 TOshiba l850
Can you eloborate?
Can you provide this modded BIOS?
Thanks...Leave a comment:
-
Re: Please help me identify a component
My bad. I totally understand what you are saying. I took the liberty to test the mosfets with the battery to provide extra info. Bad idea. From now on I will strictly follow your guidelines.
Tomorrow, I will follow the procedure you mentioned in your previous post and post the results.
Thanks again for your help.Leave a comment:
-
Re: Please help me identify a component
I removed the charger and plugged in the battery, to test the voltage on both mosfets.
Here are the values in volts with [U][B]battery only[/B][/U] plugged in:
I started with
Mosfet Q6011: Drain 11.40 / Source 11.40 / Gate 11.40
Then I wanted to check Mosfet Q6010. As I was trying to probe pin 5, although I was extra careful, a "dry" noise was heard followed by an "electrical burn" smell. I think I very shortly shorted pin 5 and the solder joint below :/
The reading...Leave a comment:
-
Re: Please help me identify a component
Here are the values in volts with power adapter plugged in:
Mosfet [B]Q6010[/B]: Drain 19.15 / Source 3.62 / Gate 3.62
Mosfet [B]Q6011[/B]: Drain 3.62 / Source 3.62 / Gate 3.62
FYI, the mosfets on my actual mobo are "E070BN"Re: Please help me identify a component
Here are the values in volts with power adapter plugged in:
Mosfet [B]Q6010[/B]: Drain 19.15 / Source 3.62 / Gate 3.62
Mosfet [B]Q6011[/B]: Drain 3.62 / Source 3.62 / Gate 3.62
Leave a comment:
-
Re: Please help me identify a component
Hello mcplslg123,
Sorry to be a complete noob, but I need to clarify.
I would have assumed that it is the component between the two mosfets that was to be tested next - marked "2" in picture below.
But from what you say, the "resistor after Q6011" seems to be the component marked "1" in the picture below.
Which should I remove for tests: 1 or 2?
Also, I attach full pictures of the board for reference:
[url]https://i.ibb.co/BTkh8sm/Toshiba-Satellite-C70-D-AR10-AN-6050-A2632101-MB-A01-2.jpg[/url]...Leave a comment:
No activity results to display
Leave a comment: