Dear forum,
I'm stuck with this old TV unit.
PSU: 17PW04-1
MB: 17MB62-1
Symptoms:
- Blue LED constantly blinking when connected to AC.
- Only sigh of life is beeping when touching the capactive buttons on the front.
Diagnostics so far:
Checked the PSU output voltages:
12V present
5V present altought its only around 4.2V
3V is present measured 3.4V.
I check TP 202 which is for the short circuit protection: 0.606V on diode mode
Since I met with some vestel models before with similiar symptoms...
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05-03-2024, 03:18 AM
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Hi friend, I've this notebook HP Gaming 16-a0006nl with QUANTA DAG3JBMB8D0 that won't power on.
I start checking first mosfet and they seems to be ok.
On power button I get 3 that go to 0 on pressing, and come to 3v on release.
After I check charge ic that is BQ738H
I write here measure with battery and ac
19
19
19
25
3
1.9
0
3.1
3.1
1
11
11
11
gnd
0
6
10
11
11
19
I've 0 on pin 7 IOUT and on pin 15 LODRV.
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Hello,
This special tool from Apple is used to recover data from Macbook A1706. I've been using it for a while but it stops working. When connecting Thunderbolt 3 between the tool and working Macbook, Macbook should prompt "new device detected, allow or not"... but it doesn't.
Has anyone ever experience this ? It's not a cabling or power supply issue, some IC have stopped working but not sure which one. Probably the one that manager thunderbolt 3
Thanks
Claude...Today, 02:02 AM -
Hi Community,
I've got the above model that activates the relay (clicks) and powers on the LG logo power light on when turned on. It then almost immediately turns off. I not noticed any image on the screen or heard any sound during this brief period.
Checks show:
3.5v on SMPS on (in off state, no other voltages present incl pwr on)
On pressing power button > the 3.5 pwn on voltage, 12v and 24v lines appear on the SMPS connnector between the main the SMPS but then all drop the zero in 1-2 seconds
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Hi everyone, I have a problem with a Samsung TV model UE50NU7400, I don't have the stanby LED, on the power supply board after a first check I found the fuse blown, and the 2 KF7N50 transistors on the primary power supply both short circuited, I replaced the fuse and the 2 transistors, now the short circuit has disappeared but I still don't have the LED off, do you have any suggestions?...Today, 02:17 AM
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Hi Good peoples;
trying to identify manufacturers of this slide Pot from a Flight controller;
there is also an S W or M S printed underneath;
Sorry I couldn't get a better picture;
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Hi
I have a Citronic AC-1USB.
When I run a turntable into it and then try to record it. The volume is too loud and distorting. In the red. Mainly 12” Singles. I haven’t tried a CD into it yet. I’m wondering if there is any way to bring the volume down inside the unit itself. Change a part or two. Put a small pot somewhere as there are no adjustments at all in there. I’m looking for the schematic but not found one yet.
Heres the circuit board inside.
Cheers
[ATTACH=JSON]{"data-align":"none","data-size":"full"...04-30-2024, 06:17 AM -
please i need unlock BIOS unowhy Y13 2021
Production year : Aout 2021
Model : Y13G011S4EI
Motherboard : EM_IG116_200b_ene_F_V1.0...05-06-2024, 03:59 PM -
Need some help to identify this laptop ic please....Yesterday, 01:05 AM
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Hello,
This special tool from Apple is used to recover data from Macbook A1706. I've been using it for a while but it stops working. When connecting Thunderbolt 3 between the tool and working Macbook, Macbook should prompt "new device detected, allow or not"... but it doesn't.
Has anyone ever experience this ? It's not a cabling or power supply issue, some IC have stopped working but not sure which one. Probably the one that manager thunderbolt 3
Thanks
Claude...Today, 02:02 AM -
I have an Asus G14 (GA401QM) that has a power issue. Originally the board had a shorted 5V rail and dead EC. I reballed a working EC, soldered it on, and I resolved the 5V issue by replacing the APL6012 and the low side 5V mosfet. Resistances on all power rails are healthy now, but 20V does not make it through the first MOSFET. 20V is present on the drain of the first MOSFET, but there is no voltage on the gate or source.
When diagnosing this issue, I thought that the issue was due to the BQ24800 chip not outputting the correct signals so I soldered on a known working chip and the...Yesterday, 01:30 PM -
Hi friend, I've this notebook HP Gaming 16-a0006nl with QUANTA DAG3JBMB8D0 that won't power on.
I start checking first mosfet and they seems to be ok.
On power button I get 3 that go to 0 on pressing, and come to 3v on release.
After I check charge ic that is BQ738H
I write here measure with battery and ac
19
19
19
25
3
1.9
0
3.1
3.1
1
11
11
11
gnd
0
6
10
11
11
19
I've 0 on pin 7 IOUT and on pin 15 LODRV.
...Yesterday, 07:09 AM -
Hi,
working on a ASUS ROG STRIX GL702VSK 60NB0DZ0-MB1260 that does not power on. At the PQ8900 PIN2 (P_CHG_ACMOS_G_20) I am receiving 24.7V and PIN1 (P_CHG_ACMOS_S_20) 20V, however when I place the PQ8901 P_CHG_ACMOS_G_20 it drops 0V. I don't have the replacement mosfets ( N-MOSFET QM3058M6AC PRPAK5*6
UBIQ) however will any N-channel mosfet with similar parameters work ? I also found that PCI8703, PCI8701 are shorted. any help would be grateful.05-07-2024, 04:34 PM -
Hi everyone, I have a problem with a Samsung TV model UE50NU7400, I don't have the stanby LED, on the power supply board after a first check I found the fuse blown, and the 2 KF7N50 transistors on the primary power supply both short circuited, I replaced the fuse and the 2 transistors, now the short circuit has disappeared but I still don't have the LED off, do you have any suggestions?...Today, 02:17 AM
-
Hi Good peoples;
trying to identify manufacturers of this slide Pot from a Flight controller;
there is also an S W or M S printed underneath;
Sorry I couldn't get a better picture;
please and thanks as alwaysToday, 01:50 AM -
Hi Community,
I've got the above model that activates the relay (clicks) and powers on the LG logo power light on when turned on. It then almost immediately turns off. I not noticed any image on the screen or heard any sound during this brief period.
Checks show:
3.5v on SMPS on (in off state, no other voltages present incl pwr on)
On pressing power button > the 3.5 pwn on voltage, 12v and 24v lines appear on the SMPS connnector between the main the SMPS but then all drop the zero in 1-2 seconds
Disconnecting 24 to TCON connector and powering on shows...Yesterday, 02:42 PM -
Please help sir, this board does not turn on because VSYS_OUT is 9.2v, I compared it with a normal board VSYS_OUT is 10.2v, I have replaced the PQ101 and PQ102 mosfet and BQ 25700 which is known to be good, but the results are still the same, thank you
VSYS_OUT 9.2v
Meter in resistance mode auto range 6M ohm ok
NORMAL BOARD VSYS_OUT 10.2V
PQ101
PIN 2 20V
PIN 7 0.004V
PIN 6 6V
PIN 5678 0V
PQ102
PIN 567 0V
PIN 9 0.004V
PIN 234 9.2V (VSYS_OUT)
PU101 BQ25700ARSNR
1 VBUS 20V...05-06-2024, 10:48 AM