Hello guys
Because the unit is old (but only occasionally used) the loudness button causes some noise due to bad contact,
sprays did not work, so i decided to solder the pins that it connects on the pcb at the on (loudness on) position
i did that and it worked fine, i know from the bottom of my heart that the switch connects 2 pins and also d/c other 2 pins
on every position it have (6 pin switch), so i was curious what would happen if i clicked the switch off while the pins are soldered at on (so basiclly on and off at the same time), when i did so the sound is gone, nothing...
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-
05-05-2024, 06:20 AM
-
When plugged in (no battery installed), the battery light on the motherboard lights up and then turn off. When powering on, the same and light and the power button also light up in a white color but no output on the display. It stayed like that for a few seconds before shutting down. I also seem to ruined a connector that connects to the WLAN, 2 USB and audio board, the same board also have a melted 2062A IC. I will post pictures in the reply sectionToday, 04:40 AM
-
I have this Sony MBX-273 on my hand. 19V present but no Voltage on 3.3, 5V Coils.
It has a [B]SN608098 [/B]Chip. When I check its pins It shows;
19V on pin 6(VIN)
5.3V on pin 4(EN_LDO)
3.4V on pin 5(VREF3)
1.3V on pin 1(VREF2)
But only 0.46V on pin 7(LDO)
Is this means Chip is gone?
I have this Sony MBX-273 on my hand. 19V present but no Voltage on 3.3, 5V Coils.
It has a [B]SN608098 [/B]Chip. When I check its pins It shows;
19V on pin 6(VIN)
5.3V on pin 4(EN_LDO)
3.4V on pin 5(VREF3)Today, 03:20 AM -
Hello
I'am a beginner in electronics repair and i got some trouble to find what's goning on a computer. It is a lenovo yoga C940-15IRH laptop and the screen doesn't work anymore, but that work on an external one
the screen seams to be hard to unbuild properly so i want to test it by other way
how can i be sure if the signal is really send to the screen ? i did some check on screen connector on LCD1 got 19v and on MiC1 connector on the other side of the screen (dunno if it's for the screen itself or other thing) got a lot of 3.2v pin
did u got...05-04-2024, 10:00 AM -
today I received MacBook Air [B][URL="https://www.youtube.com/watch?v=gnU5UAdoOZg"]A2681 M2[/URL] for repair. The MacBook is working have a startup sound and charging sound but no video on the screen I checked the backlight voltage which is 0V then I checked the backlight ic enable there is 0V on anyone please help me.[/B]
today I received MacBook Air [B][URL="https://www.youtube.com/watch?v=gnU5UAdoOZg"]A2681 M2[/URL] for repair. The MacBook is working have a startup sound and charging sound but no video on the screen I checked the backlight voltage which is04-30-2024, 04:18 AM -
Hello to all.
may I have a question about these Semiconductor parts BQ24800RUYR? can it be replaced with these parts BQ24780SRUYR?
I need some good advice and also some information about it. thank you and God Bless...Yesterday, 07:56 PM -
Hello all.
I am trying to repair a Gigabyte Z490 Aorus Elite AC motherboard that was roughly handled. It had some components ripped off the bottom of the board. The last two I am trying to replace are shown as CKA_FB1 and CKA_FB2 on the schematic and I think they are SMD 0402 30nH inductors to control the resonant impedance of the control rails. I have measured approximately 3.3VDC at CKVDD as per image below. On the board the still in place CKA_FB3 is 1mm x 0.5mm SMD component with a dark body.
I am not familiar with the symbols used in the schematic below if anyone...Today, 03:23 AM -
Hello everyone, Due to a bad bios flash this Omen has a weird issue.
In the BIOS it says the ME version is 0.0.0.0 and when I try to update the BIOS it writes the bios region but when it reaches the firmware and ME it says it failed.
Tried HP USB recovery way and nothing worked.
I am kinda stuck, the main problem right now is the laptop would boot within 5 mins until the ME drivers load in windows and all works normally....05-09-2024, 03:02 AM -
Hi, Dell Latitude E6440 VAL90 LA-9931P nRev:1.0(A00) black screen, if I push power button with "D" keyboard is test picture on screen.
Bios from machine (main+ec)
Stickers illegible...Today, 03:20 AM -
can any one help me bypass bios password for lenovo g570 core i3 model 20079
from sys info
bios version lenovo 40cn28ww(v2.14) 7/10/2011
smbios version 2.7
bios mode legacy
i want to enable virtualization but i forget bios pass
there s topic talking about shorting 2 pis of eeprom to bypass bios pass
can any one tel me where is that eeprom and if this method will work or not?
this topic show that password can be recovered from bios bakeup bin
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/84684-lenovo-g570-hdd-password-remove[/url]...Today, 03:11 AM
-
I have this Sony MBX-273 on my hand. 19V present but no Voltage on 3.3, 5V Coils.
It has a [B]SN608098 [/B]Chip. When I check its pins It shows;
19V on pin 6(VIN)
5.3V on pin 4(EN_LDO)
3.4V on pin 5(VREF3)
1.3V on pin 1(VREF2)
But only 0.46V on pin 7(LDO)
Is this means Chip is gone?
I have this Sony MBX-273 on my hand. 19V present but no Voltage on 3.3, 5V Coils.
It has a [B]SN608098 [/B]Chip. When I check its pins It shows;
19V on pin 6(VIN)
5.3V on pin 4(EN_LDO)
3.4V on pin 5(VREF3)Today, 03:20 AM -
When plugged in (no battery installed), the battery light on the motherboard lights up and then turn off. When powering on, the same and light and the power button also light up in a white color but no output on the display. It stayed like that for a few seconds before shutting down. I also seem to ruined a connector that connects to the WLAN, 2 USB and audio board, the same board also have a melted 2062A IC. I will post pictures in the reply sectionToday, 04:40 AM
-
Hello all.
I am trying to repair a Gigabyte Z490 Aorus Elite AC motherboard that was roughly handled. It had some components ripped off the bottom of the board. The last two I am trying to replace are shown as CKA_FB1 and CKA_FB2 on the schematic and I think they are SMD 0402 30nH inductors to control the resonant impedance of the control rails. I have measured approximately 3.3VDC at CKVDD as per image below. On the board the still in place CKA_FB3 is 1mm x 0.5mm SMD component with a dark body.
I am not familiar with the symbols used in the schematic below if anyone...Today, 03:23 AM -
Hello friends, today i got an A2485 820-02100-A in a desd state, found visual short on PPVIN_5VUSBC23 line, removed tantalum capacitor, installed same same value from other donor board, now there is no short on any of the rails but when i plug either magsafe3 or usbc inget 5v stable with 0.00 amps drown, no cycle, just these steady values, board is not in dfu mode, checked with magsafe and with usbc. Only value that i find on the board is ppdcin_aon which is 5v… i dont get 3,3 aon, 3v8 aon .. all missing, where should i start looking please !...Yesterday, 09:40 AM
-
HI. I need help with this board! 5v/0a stable. Replacing the u7000 did not change the situation. Before I move on to replacing the SD3215, maybe there are some tips on what to pay attention
also need a diagram and boardview
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"820-00840.png","data-attachmentid":3268566}[/ATTACH]...Yesterday, 01:50 PM -
HUAWEI MateBook X Pro 2022 12th
If you can, you can keep the DMI information
[ATTACH]n3268677[/ATTACH]
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"2024-05-11 093312.png","data-attachmentid":3268678}[/ATTACH]HUAWEI MateBook X Pro 2022 12th
If you can, you can keep the DMI information
[ATTACH]n3268677[/ATTACH]
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"2024-05-11 093312.png","data-attachm...Yesterday, 07:34 PM -
Hi, Dell Latitude E6440 VAL90 LA-9931P nRev:1.0(A00) black screen, if I push power button with "D" keyboard is test picture on screen.
Bios from machine (main+ec)
Stickers illegible...Today, 03:20 AM -
can any one help me bypass bios password for lenovo g570 core i3 model 20079
from sys info
bios version lenovo 40cn28ww(v2.14) 7/10/2011
smbios version 2.7
bios mode legacy
i want to enable virtualization but i forget bios pass
there s topic talking about shorting 2 pis of eeprom to bypass bios pass
can any one tel me where is that eeprom and if this method will work or not?
this topic show that password can be recovered from bios bakeup bin
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/84684-lenovo-g570-hdd-password-remove[/url]...Today, 03:11 AM -
Hi community! Germany calling
I am wondering if you guys can help me out. I have an issue with my Sony LED TV. I've been told this is a good place to ask. Thanks for anyone who will reply and offer advice. Appreciated!
I have a KD-65X9005A Sony 4k LED TV. For a few weeks I've got this problem where I turn on the TV and within a few seconds the TV starts getting darker until it shuts itself off and I get the 4 blinking error code. HOWEVER there is one exception: Whenever I switch to the i-Manual, a full screen on-screen instruction manual, the TV never turns off. I tested for hours!...03-20-2024, 07:29 AM -
Hello to all.
may I have a question about these Semiconductor parts BQ24800RUYR? can it be replaced with these parts BQ24780SRUYR?
I need some good advice and also some information about it. thank you and God Bless...Yesterday, 07:56 PM