Indycanard
Member
Last Activity: 05-18-2024, 02:15 PM
Joined: 10-03-2011
Location:
-
Thank you for the quick response. I'm going to replace this capacitor then, and need a hand deciphering the value. The schematic shows "220U/6.3V/ESR35_3528". I got it all figured out except the ESR value. would that be 35 mOhms? I can't find any 35 ohm at Mouser. If mOhm, then this capacitor at Mouser: T55B227M6R3C0035. Does that seem right?[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"Cap.png","data-attachmentid":3272795}[/ATTACH]...
-
After letting this repair sit for quite a while, I thought I would take one last try to repair this MB. I finally found the bad capacitor! It was on the 5V usb circuit (current limiting IC circuit) for the USB-C port. I removed that cap, and now the laptop is charging and otherwise back working. I haven't replaced the cap, just removed it and left it off....
Leave a comment:
-
Re: HP Envy 13" X360. Not getting AC power.
Schematic identifies PQ21 as FDMS7698
Markings on original removed MOSFET is 6370 GV5S1C
I replaced removed original MOSFET with a FDMS7698.
Currently still removed as I consider replacing PC248 if it would resolve my issue....Leave a comment:
-
Re: HP Envy 13" X360. Not getting AC power.
I removed PQ21. As suspected, the laptop powered on and booted to windows.
I measured PQ21 pads (with PQ21 removed)
PQ21
D ~19.5V
S 0 V
G 0 V
I then plugged in battery (still without PQ21 reinstalled):
PQ21
D ~19.5V (AC voltage)
S ~12.21V (Batt Voltage)
G ~12.21V
I was surprised to see the Gate at 12.21V. It isn't coming from BQBATDRV. According to the schematic, PC248 (0.01U/50V) capacitor connects...Leave a comment:
-
Re: HP Envy 13" X360. Not getting AC power.
Are you recommending I again remove PQ21 and try to power up the mob? Any idea why "the power supply is crossing over to the battery when the battery is connected."?...Leave a comment:
-
Re: HP Envy 13" X360. Not getting AC power.
One further data point. During my initial evaluation, I found PQ21 becoming very hot. I desoldered it and removed it to replace it. While PQ21 was removed, I plugged in to AC and the power/charge light illuminated. I did not try to boot the board, but I suspect it would have.
Not positive if it was white (AC Power) or orange (Charging), however with PQ21 reinstalled, the light was dark.Leave a comment:
-
Re: HP Envy 13" X360. Not getting AC power.
Without Battery:
PQ4
D 19.49V
S 19.54V
G 17.88V
PQ5
D 19.49V
S 19.42V
G 21.77V
PQ21
D 19.92V
S 19.42V
G 19.81V
ACIN 1.83V (steady) (common to PR107 and PR108)
REGN6V (pin 24 of Charger IC) = 6.05V
PR106 => This revision does not have a PR106 populated. I wish I has a schematic for this Rev F. However PR106 on previous Revs connected to PU12, pin 3. Measuring that...Leave a comment:
-
Re: HP Envy 13" X360. Not getting AC power.
All these measurements are with adapter plugged in with battery connected.
PQ21
D 11.5-15
S 11.5-13V
G 12.5 (not sure how I measured 21V before). Seems stable at 12.5V now
PQ4
D 11-15V
S 11-15V
G 11-15V
PQ5
D 11.5-15
S 11.5-15
G 11.3-21V
REGN6V (pin 24 of Charger IC) = 6.05V
ACIN (ACOK - Pin 5 of Charge IC) = 0V to 3V (alternating)
Note: charger is...Leave a comment:
-
HP Envy 13" X360. Not getting AC power.
I've been troubleshooting a failed laptop for a few months now. It's a personal project and I thought it would be easy. Not so much I'm figuring out. The motherboard is a DAYODPMBAFO, I found a schematic for QUANTA Y0DP REV 1A DAY0DPMBAF0 (HP ENVY X360 13-Y023CL), although my board is Rev F.
Symtoms:
Neither A/C power or battery charge light turn on when plugged in. Laptop does boot into windows with battery power, however the battery icon shows no charging or presence of the ac adapter.
Both input mosfets appear good. I can measure the 19V past both mosfets.... -
Re: Vizio M261VP blinking power light.
Thanks for the added information.
My Vizio was able to turn on successfully a number of times last night during my testing. I did not do anything specifically to cause the set to turn on, except obviously plug it in and push the power button. I was in the process of measuring the voltages on the various components.
What I found was this:
U8: The power mosfet component mentioned previously as 540N had a voltage at the upper mounting tab and clipped center pin of 19.30V when the set...Leave a comment:
-
Re: Vizio M261VP blinking power light.
I also have this same model with the exact same symptom. When I press the power button, the power light flashes for 30 seconds, then the set turns off. For a short period of time, multiple power cycles would eventually turn the set on, but that doesn't work anymore. The screen stays dark, and I don't see any image on the screen.
Instead of starting a new thread, has anyone (or even the original poster) figured out what is causing this?
What I have done so far:
1/ Did the full power cycle reset (pull...Leave a comment:
No activity results to display
Leave a comment: