i have this display but the backligth is not enable. please help 
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Re: hp-stream-14 da0p9mb16d0
Thanks this voltajes
VADJ1 pin 25 on LVDS Connector 3.2
BLON_CON pin 26 on LVDS Connector 0
+VIN_BLIGHT pin 29 & 30 on LVDS Connector 19.3Comment
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Re: hp-stream-14 da0p9mb16d0
any?Comment
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Re: hp-stream-14 da0p9mb16d0
thanks i check an fix..
VADJ1 pin 25 on LVDS Connector 3.2
BLON_CON pin 26 on LVDS Connector 3.3
+VIN_BLIGHT pin 29 & 30 on LVDS Connector 19.3Comment
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Re: hp-stream-14 da0p9mb16d0
Voltages are fine. My best bet would be a dead backlight inside the LCD. Try with another screen if possible.
By the connections i assume this is an lcd with ccfl backlight. They have high voltage inverters that can go bad.
Screens with LED backlight usually have no control lines on them. Only a relatively high voltages rail directly to the leds.
Disassemble the screen and look for an inverter board with a transformer on it.Comment
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Re: hp-stream-14 da0p9mb16d0
Only Apple uses a boost converter on the motherboard rather than on the LCD panel. Almost every other laptop feed B+ to the LCD panel, and the LED driver on the panel receives it along with enable signal and brightness adjustment signal.
CCFL haven't been used in laptops for 10 years now.
When you have a backlight issue you always have to confirm with a known good screen before suspecting the board. (and obviously making sure it's not stuck to 0% brightness, clear CMOS and draining all power is something to try too)OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Hi everyone,
Sorry for the person who’s going to read all this !
I'm on a Nintendo Switch Lite, motherboard HDH-CPU-02.
While replacing the left joystick, I had to remove the motherboard to access the connector underneath. When I lifted the LCD connector latch, it broke (the plastic had become brittle over time), so I replaced the entire connector.
During the desoldering of the LCD connector using hot air, three small components located just below the connector (likely 0402 capacitors) came off and remained stuck to the bottom of the... -
Hello, I'm a beginner for micro soldering. Right now I have some difficult to solder a qfn 20, I guess I put too much solder on the thermal-ground pad, the result is a corner of chip wich don't touch the board (last try).
I use a wire solder with hot air, I tin the board and chip before with iron and I use good flux.
I will have to solder a LVDS connector (40 pins, laptop pc), I saw a solder paste in seringe, good quality (it does not scatter).
See the test :
https://youtu.be/bNAzC-EvqHs?t=1767
With hot air from bellow the board, that's... -
Hi All -
I had replaced my ASUS 4090 Strix cooler with a waterblock and put the stock cooler on the shelf. Was moving it and snagged my sweater on the connector and pulled the wires out of the pins on the RGB connector. I tried to get them back on but its too small so I opened the stamped pins and tried to solder but its not a good repair and the wire broke on reinstallation.
Looking to replace the connector on the cable side and get pins to crimp onto a new cable. Bought random JST and such but nothing is correct. Can anyone help identify the connector and possibly matching... -
Hello All,
tl;dr: minimal electronics experience and my first repair, lifted 8 pads off the laptop display LED controller board when attempting a connector replacement, options are attempting pad repair or jump wiring.
Laptop Model: MacBook Pro 15 Mid-2014 Retina, A1398 MGXA2LL/A
eDP Display: Samsung LSN154YL01-A02, assembly sold as Apple part 661-8310
Soldering Equipment: Hakko FX-888D w/ T-18 tips (Chisel, Conical, Bevel types)
I needed to replace the 30-pin I-PEX Cabline connector (labeled J8300 in the Apple 820-3662 mainboard schematics),... -
Hi guys,
i have a damaged keyboard connector on my older Toshiba Satellite M50-A laptop. I know there is LA-A481P motherboard. In attachment pictures there is a real looking connector and i also found a schematic to the connector. But i need help with finding a real electronic part to replace the damaged connector. e.g. on aliexpress (or different page).
It is 34pin connector and the length from pin n.1 to pin n.34 is 26mm. So it means a pitch length is 0.764 mm. I have seen connectors with 0.5mm , 0.7mm , 0.8mm and 1mm pitch length. But not with 0.75. Is it some special custom connector...
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