[B][FONT=Times New Roman][FONT=Calibri]Hello, I need your advise please ? I need to remove and replace the BGA black chip with fpc connectors around. The PCB is small, from camera.[/FONT][/FONT][/B]
[B][FONT=Times New Roman][FONT=Calibri]There is no plastic component directly under, on the other face, (only fuse and oscillator I can remove if they are sensitives to heat), but there is a lot of very small smd components I don't want to desolder by mistake.[/FONT][/FONT][/B]
[B][FONT=Times New Roman][FONT=Calibri]I have :
- hot air, and a[/FONT][/FONT][/B] [B][FONT=Times...
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by oldham50
05-06-2025, 01:40 PM
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General Capacitor Questions & Issues
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05-14-2025, 01:32 AM
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Have just a general computer question, post it here. This can be anything from an OS issue, hardware issue not related to capacitors, upgrade question, or whatever basic tech-related issue is on your mind.... This is also a good place to share your tech projects!
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Microsoft Surface Pro 9 - Ram upgrade
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Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Technical discussions covering any type of desktop motherboard, video/graphics card, controller card, or whatever other desktop peripheral you need help with. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
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LG 34 GN73A
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Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
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| Specifications | ||||||
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Laptop, Tablet, & Notebook Specifications
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by Doctorbst
04-02-2025, 09:28 PM
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Server, iMac, & Desktop PC Specifications
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Topics: 8,712
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8,712 | 8,720 |
by JBUU
Yesterday, 07:35 AM
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I bought this UPS as nonworking. Annoyingly they did not mention the battery has been removed so basically a waste of money... but it's here now so I'd might as well do something with it.
The device shows no signs of life when connected to mains. If I connect a lab supply to the 12V battery terminals it powers up, and flashes the LED showing it is running on backup power. However when mains power is then applied it doesn't seem to do respond in any way. So presumably if I put an actual battery in there it would just make no attempt to charge it, it would discharge and then the unit...Yesterday, 05:15 AM -
Hi, could someone help me with this BIOS? It's a Laptop
Model: Dynabook TECRA A50-F
Part NO: PT5B1U-0RC01L
Serial: X0051716H
Board code: FTL7SY1\G4610B\A4610A
The problem is that it turns on, but never gives an image.
I leave the backup of the original BIOS of the laptop.
[ATTACH]n3641702[/ATTACH]...Today, 03:50 PM -
So, it seems I've bricked a pretty expensive laptop by removing the windows key and not reading the bios chip correctly in the process. I have managed to flash back a corrupted bios, can someone have a look at this bios and try repairing it, currently the laptop boots to the windows logo turns of after 3 seconds tries booting again after 2 seconds then 1 until its flickering the windows logo.
Surface Laptop 7 2033
S/N: BK337QH24273GT...05-18-2025, 09:05 AM -
Hi all,
I got a controller where the left stick was moving left all the time (-1.00 at calibration tool). Even after changing to hall effect sticks it stayed the same and reset and all others things didn't help.
I removed the stick again and even without it calibration tool shows a movement to the left. Anybody knows where the fault can come from? Maybe any bridges or damaged SMD components?05-02-2025, 05:00 PM -
Not long ago I just bought this used laptop from online shop, everything was normal but i realized that i couldn't enter the BIOS.
my first thought was because fast startup so i tried disabling it
but i can't enter BIOS after pressing F2/Fn+F2 after restarting the laptop
tried turning off the laptop and turning it back on then pressing F2/Fn+F2 still didn't work
lastly i tried accessing via Windows UEFI Firmware Settings and it worked, but it stopped at the password screen. tried entering some password 3 times but only showing error system locked.
So i asking...Today, 03:28 PM -
Hello everyone,
I got a Samsung The Frame 55 inch TV for free from uncle cause it is not turning on anymore. I am in the second year of training as an electrician so I have knowledge already but I am far away from to be a pro.
The TV has Standby but ist not turning on. A Friend of mine owns a 50 inch Frame TV so I checked the One Connect Box and the One Connect Cable there. Both are good and working normally. I have opened the TV case and measured some voltages on the Board.
What I already found is that the 12.8V are not an the connector to the main board connector to the power...04-23-2025, 01:48 AM -
Hi!
I have an ASUS B85M-E with non-working USB and PS/2 ports.
GND and 5V are present.
I have tried other PCI and PCIe USB cards, but it still doesn't work.
I have reset the CMOS, updated the BIOS, but the problem is still the same.
What else should I check?
Half dead chipset ?Today, 02:03 AM -
Hello, got an iPad Pro A2378 12.9 5th gen with no backlight. Got another test unit without screen, tested the screen, still no backlight with the test unit.
Figured out the backlight on the screen was bad, ordred a new backlight from mobilesentrix, *carefully replaced it* without damaging the lcd, oh well.
Final result, issue is still there, the screen has no back lights. So i'm back to square one, with 3 hours less and 100$ out, issue still on the screen.
The panel is still ok, i can see the apple in the middle of the screen when it kicks in, just no backlight.
Anyone...Today, 09:17 AM -
Hi all,
I have recently picked up this Dell OEM Nvidia GTX 750Ti 2GB Video card. Its an old card I know but still wanted to get it working if possible. The problem is the following:
- Put the card in my testing motherboard and start running Heaven benchmark
- Benchmarks seems to run smoothly up until half way then the motherboard completely shuts off immediately
- Try to start it again and I get a slight move from the PSU fan - a clear short
- A little troubleshooting later I find one shorted Mosfet - Replace them both - short is gone
- Put the...05-18-2025, 04:18 PM
-
Hello, got an iPad Pro A2378 12.9 5th gen with no backlight. Got another test unit without screen, tested the screen, still no backlight with the test unit.
Figured out the backlight on the screen was bad, ordred a new backlight from mobilesentrix, *carefully replaced it* without damaging the lcd, oh well.
Final result, issue is still there, the screen has no back lights. So i'm back to square one, with 3 hours less and 100$ out, issue still on the screen.
The panel is still ok, i can see the apple in the middle of the screen when it kicks in, just no backlight.
Anyone...Today, 09:17 AM -
Hello,
I have an Asus X415EA board that is not charging the battery after some liquid damage. Everything else works, except charging the battery.
So far I measured all the pins on the bq24780s controller with the following result:
1. ACN = 0.0V
2. ACP = 19.02V
3. CMSRC = 18.5V
4. ACDRV = 23.9V
5. ACOK = 5.9V
6. ACDET = 2.57V
7. IADP = 0.17V
8. IDCHG = 0V
9. PMON = ?
10. PROCHOT = 5.05V
11. SDA = 3.3V
12. SCL = 3.3V
13. CMPIN = 0.47V
14. CMPOUT = 6.0V
15. BATPRES = 0.0V
16....Yesterday, 04:05 AM -
Not long ago I just bought this used laptop from online shop, everything was normal but i realized that i couldn't enter the BIOS.
my first thought was because fast startup so i tried disabling it
but i can't enter BIOS after pressing F2/Fn+F2 after restarting the laptop
tried turning off the laptop and turning it back on then pressing F2/Fn+F2 still didn't work
lastly i tried accessing via Windows UEFI Firmware Settings and it worked, but it stopped at the password screen. tried entering some password 3 times but only showing error system locked.
So i asking...Today, 03:28 PM -
Hello there
I am trying to recovery my old HP Compaq laptop, and this time the problem is: using HWMonitor on Windows or sensors on linux, the temperature measures are shown in the picture, but when I touch the heatsink I would say the temperature is above 100ºC!!! what do you think is the problem?...Today, 01:54 PM -
Hello all,
I tried to repair my T480 motherboard.
The PC can not power off at all.
I tried the USB-C meter on both ports : it's loop on/off. I think I can not negotiate the 10-20V voltage.
I tested with an USB "classic" 5V charger with to USB-C : the USB-C meter displays 5,080 V, 0,02 A with some pics to 2,5 A
The USB-C meter was being tested on other USB-C device, it's works fine.
Thank you in advance for your help.
[B]LINK to Schematic[/B] -> [URL="https://www.badcaps.net/forum/troubleshooting-har...Today, 01:36 PM -
Hi, I've never worked with a MacBook before, so I need some advice.
I have a MacBook Air A1932 (820-01521). When I plugged in the charger with an amp meter, it showed 19.7V and 1.9A, which indicates that it's charging, but when I press the power button, it doesn't turn on. So, I disassembled it, disconnected the battery, and plugged in the charger again. It showed 19.6V and 0.04A, and pressing the power button had no effect—no current draw at all. Then, I removed the motherboard, connected the charger again, and got the same results. I took a multimeter and checked all the coils, and everything...Today, 11:19 AM -
Hello all
I need some help to repair a corrupt bios for a Asus Tuf 507VV-LP193
Motherboard: FX507-MP-GBM 6050A3437302-MB-A01
Serial Number: S1NRKD018461017
CN: 5DKZ
I don't have rsmrst, maybe bios is corrupted. I read it twice with a CH341a and same info on both files.
Thanks for your support!!...Today, 04:18 AM -
I bought a case of them the battery cells are made in China the charge curve looks decent for 1 amp charging rate there is also a BMS protection board which here is the website link to them
[URL]https://batteryhookup.com/collections/more-featured-products/products/new-full-case-100x-3-3v-2200mah-200x-18650-lifepo4-cells[/URL]
Here are more of the same but the difference is that they do not have the BMS protection boards but have the tabbing on them
[URL]https://batteryhookup.com/collections/lifepo4-cells/products/new-full-case-128x-3-3v-1100mah-lifepo4-power-cells[/URL]...03-09-2025, 02:30 PM -
Hi.
I have a Lenovo ideapad 100-15 with probably bad dGPU.
I tried to disable it by desoldering inductors going to dGPU.
I desoldered 2 inductors (PL705 and L706) going to +VGA_CORE
And 1 inductor (PL701) going to 1_05VS_LX.
Is there anything else I need to desolder?
If the PL701 is in place, I get fan spin at start, but nothing on the screen, no POST.
If PL701 is desoldered, there is no fan spin, but LCD gets powered on (without backlight), but no POST.
I have attached link to boardview and schematics.
...Today, 12:30 PM -
Hope someone will help. I was trying to update BIOS Version from F.33 to F.75 and during update we had a power surge and now laptop turns on, i can hear cooling fan, but will not POST. I tried creating Recovery USB Drive and it didn't work. What do I have to provide?
[B]Serial Number CND805916N[/B]
Hope someone will help. I was trying to update BIOS Version from F.33 to F.75 and during update we had a power surge and now laptop turns on, i can hear cooling fan, but will not POST. I tried creating Recovery USB Drive and it didn't work. What do I have to provide?
[B]SerialYesterday, 09:21 PM