Hi!! I have been given this old TV set.
When I hit the power button, the BL (as you know this is a CFL backlight) turns on, video works fine as I can see the LG logo show off, but the backlight starts going on-off for 3 times, when it gives up and turns completly off
This set has a inverter board on the top right corner. This inverter (or the tubes, I don't really know) buzzes very loudly during the second that the BL stays ON. I have posted a video, turn your volume UP!

[url]https://fileport.io/9EdfmD5qtEaw[/url]

I have checked voltages at the PS
All...

I have an air con appliance that doesn't always start when power is applied. I have removed the small control board which is separate from and supplied by a 24v power supply (that works fine) and inspected it for any obvious failed components but can see none. I have discovered that the board will start if I wave a hair dryer over it for a few seconds. The board appears to have no temperature sensors or sensitive components on it. Can anyone suggest what the most likely candidate for a failure mode of this form.
Many thanks.
John...

I have purchased an 100-240v AC/5v 2a DC adaptor from aliexpress,and a month ago It smelled burning when I plugin it powerstrip.
Since then, This AC/DC adaptor have been out of order.
But A few days ago,I replace 0.5 watt resistor with 1 watt resistor(1ohm) in this adapter.
After replacing resistor,It succeed to recharge all of android phone.And When I measure voltage on the two pins of USB port,It shows 5.5v
Is it okay to replace 1/2 watt resistor with 1 watt resistor in AC/DC adapter?
And Is there any possibility that it will suddenly explode as well as to be out...

I have just realized that my meter is off, when I measure the car's battery, and I can't imagine how that happened.
I also have a 87, and when I doubled checked the voltage, the 87 was showing 3.5V higher, than the 189. Most likely the 189 is off.
Where should I start with the 189?
Switched leads between the two meters, but nothing has changed.
I have not opened it yet.
Any help would be appreciated....

Hi everyone, I hope someone can help me solve my problem, I have the case of a legion t5 where I have installed an asus tuf gamig a520m-plus motherboard, the audio connection cable on the case is an F_audio connector with 14 PIN , on my new motherboard the connector is a 10-pin AAFP, I saw that there are adapters on sale but at the moment I have no way of having them available in a short time, I made several attempts and managed to listen from the front headphones, only that there are some problems, the headphones are only detected if the microphone is connected, I definitely got confused with...

When the power is turned on, a snapshot appears on the screen and it turns off. 2 red LEDs are flashing.

I disconnected the power module cable going to the main board. I threw a power on jumper with 3.3 v from outside. The relay is working and there is 12v and other voltages in the power socket.

Where else should I look? All fuses appear to be intact.​

LG 39ln575s - power ON, backlight ON but no screen.
I checked TCon board V390HJ1-CE1 and VCL -8V, VCH 30.2V.
Display is HC390DUN. With both strip is backlight only - nothing on the screen.
If I put 1st strip off, I see 50% black 50% white. If I put 2nd strip off, see some lines vertical/horizontal with pink color (probably color of LG logo) and after that, white on thle left corner.

The IC chip CM501 (probably booster for VCL and VCH is hot - after 1 minute is not possible to put finger for more than half second.. So I think it has got about 70C. Is it normal?...

Hello !
I am repairing an iMAc A1311 main board 820--3126A and power supply board 614--0445.
Does this power supply have a 0 Ohm resistor (R106) with one side connected to ground and the other to pin 5 of the 12V S0 connector? I don't understand and I don't have an electrical diagram for this source.
Can someone help me ?
Thank you​

Hello,

I'm working on a MacBook Air A2337 that had liquid damage on the right I/O board. I ultrasonic cleaned the board and it all functions except the computer has no audio. I tried reballing the audio IC which is [B]TAS5770AC0[/B], but that did not restore audio. I could just replace the entire board, but I wanted to see if replacing the audio IC would fix it first. Mouser has a similar audio IC in stock which is [B]TAS5770LC0YFFR, [/B]but I wasn't sure if it is compatible. I was just wondering if anyone knew if I could use the one from mouser as an acceptable replacement or if...

[SIZE=14px][FONT=Arial]Hi All - I am hoping someone can help with some pointers (complete noob here!)

I have recently purchased a Scotle HR460 BGA reball machine (it's a bit old and I think the company no longer exists either), but as far as I can tell it is a competent and unmolested machine that should be good enough for my needs.
My biggest problem is that it came with no profiles, and I must re-create all of them from scratch, something that is very scary for someone that doesn't really know what they are doing.
The simple stuff like a small memory module isn't a big...

thinkstation p410 asm ( 00fc992 ) please i need bios dump

LG 39ln575s - power ON, backlight ON but no screen.
I checked TCon board V390HJ1-CE1 and VCL -8V, VCH 30.2V.
Display is HC390DUN. With both strip is backlight only - nothing on the screen.
If I put 1st strip off, I see 50% black 50% white. If I put 2nd strip off, see some lines vertical/horizontal with pink color (probably color of LG logo) and after that, white on thle left corner.

The IC chip CM501 (probably booster for VCL and VCH is hot - after 1 minute is not possible to put finger for more than half second.. So I think it has got about 70C. Is it normal?...

Hi everyone i have laptop Lenovo Legion 5 15IMH6 need bios . .
model board is HY56F / HY56H NM-D821
SN:PF33HWLL
THIS IS BACKUP BIOS

I have an air con appliance that doesn't always start when power is applied. I have removed the small control board which is separate from and supplied by a 24v power supply (that works fine) and inspected it for any obvious failed components but can see none. I have discovered that the board will start if I wave a hair dryer over it for a few seconds. The board appears to have no temperature sensors or sensitive components on it. Can anyone suggest what the most likely candidate for a failure mode of this form.
Many thanks.
John...

Hi people.

I have been trying to get my head round these issues with the eMMC putting the TV in to a boot loop condition, or completely dead, when a dump of the Boot 1, Boot 2 and USERDATA partitions have been made, the MLC lifetime counter has been reset, using the original eMMC with the RPMB partition intact and the eMMC is flashed with the original dump, Netflix and a few other Apps don't work. i assume all the DHCP keys and factory programmed RPMB access Key will be contained within the original dump, and as we are re-flashing the original eMMC i would expect every thing to work....

Hello !
I am repairing an iMAc A1311 main board 820--3126A and power supply board 614--0445.
Does this power supply have a 0 Ohm resistor (R106) with one side connected to ground and the other to pin 5 of the 12V S0 connector? I don't understand and I don't have an electrical diagram for this source.
Can someone help me ?
Thank you​

Hello,

I'm working on a MacBook Air A2337 that had liquid damage on the right I/O board. I ultrasonic cleaned the board and it all functions except the computer has no audio. I tried reballing the audio IC which is [B]TAS5770AC0[/B], but that did not restore audio. I could just replace the entire board, but I wanted to see if replacing the audio IC would fix it first. Mouser has a similar audio IC in stock which is [B]TAS5770LC0YFFR, [/B]but I wasn't sure if it is compatible. I was just wondering if anyone knew if I could use the one from mouser as an acceptable replacement or if...

[SIZE=14px][FONT=Arial]Hi All - I am hoping someone can help with some pointers (complete noob here!)

I have recently purchased a Scotle HR460 BGA reball machine (it's a bit old and I think the company no longer exists either), but as far as I can tell it is a competent and unmolested machine that should be good enough for my needs.
My biggest problem is that it came with no profiles, and I must re-create all of them from scratch, something that is very scary for someone that doesn't really know what they are doing.
The simple stuff like a small memory module isn't a big...

Hi

[U]Pilot PD43S9HE Led TV . Panel model[/U]: See in photos

Photos tell it all really. ( added Logo image photo )
The bulge in the area before the panel Matrix .
To me it looks like a local short that heated inside.

Should I waste my time in flipping the panel , as if this issue can be repaired ?
The distribution board at this end looks ok , though I did not measure anything

What are your thoughts ?

CheersHi

[U]Pilot PD43S9HE Led TV . Panel model[/U]: See in photos

Photos tell it

When the power is turned on, a snapshot appears on the screen and it turns off. 2 red LEDs are flashing.

I disconnected the power module cable going to the main board. I threw a power on jumper with 3.3 v from outside. The relay is working and there is 12v and other voltages in the power socket.

Where else should I look? All fuses appear to be intact.​