Hi,
We are having problem with HP omen [B]HP 15-dh1005na[/B] Motherboard:GPC54 LA-J662P Rev 1.0 laptop randomly restarts, and it did not charge battery. PQB01 we're blown replaced, laptop charging only while laptop is off. While the laptop is ON in windows, we're getting a message that charger wattage is incorrect, and it does not have a charging light at all. Tried on 180w, 120w and lab PSU, no change, while it's off it does charge on any charger.
PQB 1&2 S&D 19.5v, G 24v.
The laptop does not power on while battery disconnected, only show white light on...
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by tommy97Today, 09:57 AM
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by sretchko[FONT=Arial]Hey fellow solder fume lovers, I have a Vintage Sony Receiver STR-4800 SD that has me stumped. [/FONT]
[FONT=Arial]The Balance Pot has to be set at about 30 degrees (11 o'clock) to the left for the output to be balanced (see photo). I'm using an oscope, sig gen 1kHz sine, 8 ohm dummy load).[/FONT]
[FONT=Arial]When output is balanced (11 o'clock left) both channels clip at about 19 vac / 45 watts RMS, Amp is rated at 35 watts so I know the amp modules are good. Square wave also looks good when turning bass & treble pots and is in phase. [/FONT]
[FONT=Arial]I...Badcaps Electronics Repair Forum & Schematic Search-
Channel: Troubleshooting Audio Equipment
Yesterday, 06:02 AM -
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by ProttHello, my apologies for reviving this thread. I have a 8gen NUC with a (possibly?) dead bios - the fan starts up, slows down, but it doesn't show any picture (recovery button doesn't work either). The dump is attached.
Could anybody please help me with fixing it? I am not able to find any BIOS dumps for this model anywhere.
[B]S/N:[/B] BTDN9320085T
[B]Model: [/B]BLKNUC7i7DNKE
Thank you so much! Hello, my apologies for reviving this thread. I have a 8gen NUC with a (possibly?) dead bios - the fan starts up, slows down, but it doesn't show any picture (recovery...-
Channel: BIOS & Schematic Requests!
04-16-2024, 07:02 AM -
-
by ATS-ByronHi All,
I tried two different power adapters.
On the lines that are marked as 20V on the boardview, I only have 5V. But there is no light that comes on at all when this think is plugged in.
Customer stated that it just stopped charging and then when the battery died that was it.
I have a suspicion that it could be U7303 which I believe controls the voltage setting for the adapter? [B]Markings are RD LYBK CVEB[/B]
Any help would be appreciated!Hi All,
I tried two different power adapters.
On the lines that...03-23-2024, 05:53 PM -
by reassorHi.
I got dead one.
3VALW is just pulsing then goes down. i removed the jumper PJ402 and it suddenly stays up but PG pin on that IC is around 0.5v and droping.
There is no obvious shorts. Wierd thing is that on the other side of the PJ402 i have 1.4V from somwhere ...
Injecting 3.3v there draws 300mA and nothing is heating up.
the ic is SY8386BRHC_QFN16 (kinda uncommon here - so i do not have a spare to test it)
any ideas to check before i order a few of these?Yesterday, 01:47 PM -
by Fast AlphaHi I have a PlayStation 2 games console and th[B]e [/B]controller port cable, on models beginning with SCPH-3003.
I included a picture of the model below. What replacement can I get from Parnell, it should be a ribbon cable?Hi I have a PlayStation 2 games console and th[B]e [/B]controller port cable, on models beginning with SCPH-3003.
I included a picture of the model below. What replacement can I get from Parnell, it should be a ribbon cable?Hi I have a PlayStation 2 games console and th[B]e [/B]controller port cable, on models beginning with SCPH-3003.
2 Photos03-19-2024, 06:29 PM -
by Keshenatech1Does anyone have a schematic or parts list for a ZWS150BAF-12 12V power supply? I have a dead one and I've determined the surface mount diode on the back side of the board that connects from the center leg of Q3 to the + side of the 420V 60uf capacitors has a 3.5 ohm short. I'm not having much luck trying to identify the diode as the part number is not very legible. In the attached picture, it's the black rectangular diode in the center. There are some numbers on it but I can't even tell if it's right side up or upside down. The picture is from a 2nd good working unit which is more legible...Today, 08:58 AM
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by Nash1405Have you found the issue? I might also have a very similar issue with A2338, the battery charging sign comes up then the Apple logo comes up for 2-3 sec and shuts back down. can't able to find the issue. I am getting good readings all over the board. A little help would be nice. Thanks!...Yesterday, 11:46 PM
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by DoOm86TV philips 55'' no backlight (image ok).
I tested the backlight with my led tester from the unplugged connector cable and it lights up. I had voltages at the motherboard connector, but anyway I order a new psu. Same problem, same voltages. Disassembled the TV and checked every strip with my led tester, they all light up, same voltage for every pair of strip (they go two by two).
What am I missing?
And something else I don't understand. I checked and I have 3v Leds, 10 per strips. Why every pair of strip (so 20 Led) take about 32v when powered up with my led tester 🤔2 Photos04-16-2024, 03:47 PM -
I need bios for toshiba satellite pro r50-b-15j motherboard faebsy2
i have tried this :
but no power
and i tried this
the laptop worked but asked for a password
i have tried many with same motherboard name wich is FAEBSY2 A5A003954010 A but the laptop didnt turn on (no lights, no fan spinning)
i have attached my original bios wich has been corrupted after a windows update (turn on but black screen)
if any have the bios for the exact model name will be great "toshiba satellite pro r50-b-15j"...-
Channel: BIOS Requests ONLY!
Today, 07:54 AM -
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by Keshenatech1Does anyone have a schematic or parts list for a ZWS150BAF-12 12V power supply? I have a dead one and I've determined the surface mount diode on the back side of the board that connects from the center leg of Q3 to the + side of the 420V 60uf capacitors has a 3.5 ohm short. I'm not having much luck trying to identify the diode as the part number is not very legible. In the attached picture, it's the black rectangular diode in the center. There are some numbers on it but I can't even tell if it's right side up or upside down. The picture is from a 2nd good working unit which is more legible...Today, 08:58 AM
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by norbiszokeHello,
We have this set here in our shop that is not ginving sign of life besides red light that is blinking one time after pressing the button and nothing more... After detaching the mainboard from the PSU (this set has separate board thank god?! or not...) the backlight comes on. After reattaching nothing besides red light.... Can anyone from the forum help me here? Thank you in advance. Here's a link with images of the mainboard and the memory IC's that are on it.
Regards, Norbert!...Yesterday, 06:54 AM -
by totto210hey guys, need this pls [URL="https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/overview"]H510H6-M2[/URL]
[url]https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/download[/url]
the one in site is for upgrade hey guys, need this pls [URL="https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/overview"]H510H6-M2[/URL]
[url]https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/download[/url]
the one in site is for upgrade hey guys, need this pls [URL="https://www.ecs.com.tw/ls/Product/Motherboard/H510H6-M2/overview"]H510H6-M2[/URL]-
Channel: BIOS & Schematic Requests!
Today, 06:10 AM -
-
I need bios for toshiba satellite pro r50-b-15j motherboard faebsy2
i have tried this :
but no power
and i tried this
the laptop worked but asked for a password
i have tried many with same motherboard name wich is FAEBSY2 A5A003954010 A but the laptop didnt turn on (no lights, no fan spinning)
i have attached my original bios wich has been corrupted after a windows update (turn on but black screen)
if any have the bios for the exact model name will be great "toshiba satellite pro r50-b-15j"...-
Channel: BIOS Requests ONLY!
Today, 07:54 AM -
-
Hi guys! We need a bios dump.
Model Legion 9000 PRO 8 (2023)
s/n PF4T63Y1
I downloaded the bios on the official Lenovo website
It is not possible to fill it with a programmer on a flash drive
In the original flash drive, the file weight is 2 MB.
Please help me)-
Channel: BIOS Requests ONLY!
Yesterday, 06:36 PM -
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by limpidityPlease let me know the resistance value shown in the picture...
If you have a circuit diagram, please share it......1 PhotoToday, 07:38 AM -
by chaos-theoryI have a card that does post at all, the owner said it does go into windows but it gets stuck on the logo with artifacts, I have no idea if he is lying or not... I tried the card on my pc and it does not post at, no beeps, no bios nothing just all fans turning and nothing else. I tried plugging DVI or hdmi but nothing, I tried unplugging the 8 pin plug from the power supply and it's the same thing.
I just want it to post and get into the bios at least.
Forgive me if I am wrong, but I tested the 3 PCIe 12v power pins on the left(550ohm) and the 4th one from the right 3.3v (400ohm),...Today, 02:42 AM -
by chth96I usually tried to find datasheet which contains Maximum ESR value like KME datasheet.
[URL]https://www.westfloridacomponents.com/mm5/graphics/S06/KME250VB10RM10X20LL.pdf[/URL]
As far as I know,Maximum ESR means boundary ESR value for bad capacitor.
But,In many case,there is no ESR value in datasheet like below links.
[URL="https://www.mediafire.com/file/fhe8h0x4fmblgzn/SAMWHA-RG_Series_.pdf/file"]SAMWHA-RG Series (mediafire.com)[/URL]
[URL="https://www.mediafire.com/file/wwiiluhtci0qxb0/samyoung_SMS_Series.pdf/file"]samyoung_SMS_Series...-
Channel: General Capacitor Questions & Issues
Today, 02:30 AM -
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by Super360Hi as you can see from title, I have a samsung tv here that will show the smart tv logo and then no picture after that even hitting input or menu on remote and shows nothing but the backlight still appears to be on. The tv will turn itself off after a minute or so automatically. I'm somewhat confused if this is either a eeprom problem or a bad led strip problem. The power supply makes a pretty noticeable humming sound when it's turned on leading me to believe one of the leds are shorted but idk honestly. Any of you guys have any help for me? I have a good multi meter and can take pictures of whatever...4 Photos04-13-2024, 10:05 PM
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by vinzmthi to all
i have this logic board with no back light, image is present.
unknow istory.
on q7707 pin 5 EDP_BKLT_EN found 3.3 v, pin 1 gnd damage, pin 2 BKLT_PLT_RST_L only 0.08v (but is 3.3 on r2088 pin 2)
remove q7707 and find this
any suggestions?
thanks...1 PhotoYesterday, 07:05 AM