I have an 21 inch CRT TV which is not able to power on.
I disassembled 21 inch CRT TV and measured voltage of main filter capacitor(Samhwa HC 400WV 220uF) in the circuit.
It shows 270V on my DMM.
So I discharged this main filter capactior completely and detached circuit board from cathode-ray tube.
Then I desoldered this main filter capacitor from circuit board.
But I noticed that this desoldered large capacitor(Samhwa HC 400WV 220uF) is slowly charged by itself until it reached 0.6V
I measured its ESR value with MESR-100 and it shows 0.1 ohm,judging...
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by bohabohaI'm thinking of buying some single smd led diode for tv repair to have under hand there is so many, 2835 k-6000k 9v.6v, 3v white etc but don't know which to have if you advise me which Should I buy and which is most usual and bäst to have under hand. thank you...Today, 02:00 PM
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by KABYhello every one
i have bought seconde hand chromebook i fund that its locked by administrator by serial number can someone help me with this
i tried rcunlocker nothing happend enrollment dev mod nothing CHANGED IN bios
when i change serial number laptop wont turn on ( i change only one number in bios bin not everythin)
can someone help me with it!!!!
the serial number is NXHKAEF006321039717600
ORIGINAL BIOS BIN...-
Channel: BIOS Requests ONLY!
Yesterday, 10:34 PM -
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Hi,
I've a HP 250 G6 with:
1wy08eea#abz
Intel i3-6006
Integrated GPU
M.B. csl50/csl52 la-e791p
rev 2.0
I tried to update the bios but after that the PC doesn't start anymore.
No blink from caps lock.
I tried to use Hp tool but nothing happens.
I backed up the bios from he tool before updating and now I have 5 different .bin files, all 8.192KB in size.
I have someone that can flash the chip for me but I don't know which file to give him to write, can someone give me some pointers please?
Thankyou in adavance....-
Channel: BIOS Requests ONLY!
Today, 01:39 PM -
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by mecha1166I am working on a QN750Q8FNBFXZA. Dead except the standby light. It blinks what appears to be 1 3 1 2. 1 long blink, pause, 3 short, pause, 1 long, pause, 2 short, pause, repeat. A service manual would be very helpful, or if anyone knows these error codes. Thanks!Today, 08:31 AM
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by jingleslacksHey Friends!
I have both a live and demo unit. Demo unit firmware disables Bluetooth, power toggle, and other settings. Resets via button combos will not work on these. Reaching out to Marshall is not an option either.
I copied my live CMOS chip and flashed it to the demo unit, but that didn't fix it (MX25U3235F) This has worked for other devices in the past. I'm not a chip expert, but I'm assuming the firmware is stored in another chip.
If anyone has any experience or ideas, let's hear them!
Stanmore II
Stanmore 2...-
Channel: Troubleshooting Audio Equipment
03-23-2024, 05:09 PM -
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by learnmoreHello Community,
As part of an ongoing learning project, I'm trying to perfrom a panel test (where, according to some, you jump 12v to the (Tcon) then jump 3.3V to panel test pin on the FPC connector). For the model I'm testing with, I'm unsure of where the test pin is located (providing there is one). So, I'm after some help to locate it. Here are some shots of the board (note mainboard, Tcon combo board)....03-16-2024, 10:41 AM -
by FronczekHello people,
I've got this laptop not working for repairs, and as you can see something was done to it as you can see in the coils PL58XX (which I for some reason cannot find in the schematics...) The first FET (PQ201) was not an original part and a questionable one at that and the second one (PQ202) was shorted. Both are N-channel. Ordered replacements for them and replaced them after arrival. Now I have encountered another problem: there is no power at the second FET. By following the thread linked I got to the injection part. Applied 0.8V at 1.5A, but couldn't feel anything getting hot,...Technical discussions covering any type of laptop, notebook, netbook, tablet, or smartphone. 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!Today, 04:18 AM -
by shahnldGood day.
i received used bga rework station wds-580 which was not going above 300c despite the parameter was set to 350c, Everytime beeps at 300c so i did a factory reset and by mistake washed data and log etc. now the station boots to a white screen.
Does anyone has a firmware for this station and want to share with me. i will really appreciate any help possible..
kind regards...Today, 01:14 PM -
by jikonikHello I have a nintendo switch HAD-CPU-10 and the component in the red circle is knocked... any help to identify it will be highly appreciated!1 Photo03-25-2024, 01:05 PM
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by mecha1166I am working on a QN750Q8FNBFXZA. Dead except the standby light. It blinks what appears to be 1 3 1 2. 1 long blink, pause, 3 short, pause, 1 long, pause, 2 short, pause, repeat. A service manual would be very helpful, or if anyone knows these error codes. Thanks!Today, 08:31 AM
-
by FronczekHello people,
I've got this laptop not working for repairs, and as you can see something was done to it as you can see in the coils PL58XX (which I for some reason cannot find in the schematics...) The first FET (PQ201) was not an original part and a questionable one at that and the second one (PQ202) was shorted. Both are N-channel. Ordered replacements for them and replaced them after arrival. Now I have encountered another problem: there is no power at the second FET. By following the thread linked I got to the injection part. Applied 0.8V at 1.5A, but couldn't feel anything getting hot,...Technical discussions covering any type of laptop, notebook, netbook, tablet, or smartphone. 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!Today, 04:18 AM -
by tehmatixThe controller starting when is powered and waiting for ON/OFF button command.
The ON/OFF button is made with an optoelectronic device which detect your finger, but is not responsive to anything.
Photos on next ...Today, 10:30 AM -
by bohabohaI'm thinking of buying some single smd led diode for tv repair to have under hand there is so many, 2835 k-6000k 9v.6v, 3v white etc but don't know which to have if you advise me which Should I buy and which is most usual and bäst to have under hand. thank you...Today, 02:00 PM
-
Hi,
I've a HP 250 G6 with:
1wy08eea#abz
Intel i3-6006
Integrated GPU
M.B. csl50/csl52 la-e791p
rev 2.0
I tried to update the bios but after that the PC doesn't start anymore.
No blink from caps lock.
I tried to use Hp tool but nothing happens.
I backed up the bios from he tool before updating and now I have 5 different .bin files, all 8.192KB in size.
I have someone that can flash the chip for me but I don't know which file to give him to write, can someone give me some pointers please?
Thankyou in adavance....-
Channel: BIOS Requests ONLY!
Today, 01:39 PM -
-
by shahnldGood day.
i received used bga rework station wds-580 which was not going above 300c despite the parameter was set to 350c, Everytime beeps at 300c so i did a factory reset and by mistake washed data and log etc. now the station boots to a white screen.
Does anyone has a firmware for this station and want to share with me. i will really appreciate any help possible..
kind regards...Today, 01:14 PM -
by samstownHello,
I have this Hiopos Cash system running on android that stopped working without notice. The power supply is ok, there's light on motherboard but when pressing power button it doesn't turn on.
I've google for schematics but no luck. Motherboard is S2802_V1.3B. I've took some measure and maybe it could be a transistor, the one I am pointing on with the orange arrow on the pics. Does anyone knows this board ?
Thanks
Sam...Yesterday, 07:26 AM -
by chth96I have an 21 inch CRT TV which is not able to power on.
I disassembled 21 inch CRT TV and measured voltage of main filter capacitor(Samhwa HC 400WV 220uF) in the circuit.
It shows 270V on my DMM.
So I discharged this main filter capactior completely and detached circuit board from cathode-ray tube.
Then I desoldered this main filter capacitor from circuit board.
But I noticed that this desoldered large capacitor(Samhwa HC 400WV 220uF) is slowly charged by itself until it reached 0.6V
I measured its ESR value with MESR-100 and it shows 0.1 ohm,judging...-
Channel: General Capacitor Questions & Issues
Today, 08:56 AM -
-
yesterday i bought this [ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"251","title":"corrossiom.png","width":"354","data-attachmentid":3238358}[/ATTACH]
I was not high on caffeine but the specs we nice-[LIST][*]Processor: AMD Ryzen 5 4600H 6 x 3 - 4 GHz, Renoir-H (Zen 2)[*]Graphics adapter: AMD Radeon RX Vega 6 (Ryzen 4000/5000)[*]Ram: 16gb DDR4[/LIST]so i bought it now i need schematics and help trouble shooting this all i saw is this burned cap idk what...03-19-2024, 05:00 AM -
by bohabohaOn this set new LED strip. Backlight on but no image
have discovered very hot ic in red market in the picture plus some capacitor that are shorted on mainboard ,3v,5v,and 12v is in present want help deciding which is the bad boy...03-26-2024, 05:27 PM