my problem with this laptop is that it shows the backlight just with a blink then totally off upon power up. tried already replacing the inverter and LCD but it doesn't cure the problem. if i press the LCD standby switch the backlight will just also blink... also if some one could provide a schematic is very much appreciated. thanks....
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Re: Toshiba L35-S2171 LCD Backlight problem
does the laptop continue to start/boot? -
Re: Toshiba L35-S2171 LCD Backlight problem
for schematic, need the motherboard code. Can you see image on the screen, without bl ? if yes, i think your on/off signal is missing which comes from EC. trace it, you'll find the fault, or maybe you dont have +19v.Comment
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Re: Toshiba L35-S2171 LCD Backlight problem
Check voltages in inverter like +19v Power +3.3V Enable and Dim 1.5V-3V. If voltages present inverter is faulty or the backlight is worn out, try another backlight tube?
If 19v is there but no enable or no dim backlight will not come. Lets say you have enable but dim signal is missing, you can just solder a jump wire or resistor from the 3.3v to the dim. If enable missing, maybe broken trace on motherboard, you can also get the voltage from a different point of the motherboard, anywhere where the 3.3v comes on after you press the power button.Comment
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Re: Toshiba L35-S2171 LCD Backlight problem
Did you try replace the screen cable matey?
Another thing - though I could be grasping at straws here - the flickering thing. Maybe it's detecting something plugged into the VGA port? Have you tried setting the BIOS not to automatically use VGA?Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSDComment
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Hi. I have a problem with Asus ROG GA402RK. The keyboard suddenly stopped working along with the kb backlight. I replaced the keyboard and the ITE KBC chip and the problem is still the same. I don't see any passive elements that look damaged. Does anyone have an idea?04-28-2025, 04:30 PM
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Hi everyone,
I'm new here and trying to repair my Panasonic TX-P50V10E plasma TV, which is currently showing the 6 red blink error code.
Just for context: I'm used to building PCs and installing modchips in old consoles, but this is my first time trying to fix a TV. I'm French, and while my English is okay, I'm using ChatGPT to help translate and clarify my messages as much as possible — so please forgive any odd phrasing.
I'm also not very experienced with using a multimeter, but I'm very motivated and ready to follow instructions carefully and report... -
hello everyone!
As the title states i am an owner of an LG flatron M2362DP 23 inch monitor Tv. Since i currently use it as a tv i'm posting the problem on the "troubleshooting tvs and video sources" section.
I'm from Greece so English isn't my native language, so please forgive me for any mistakes i make. I have basic knowledge in electronics, and although i have a degree, many things have changed since i finished a 2 year coarse (over 30 years ago). Occasionally i repair easy stuff, mostly things that break at home like appliances.
So i decided to try to... -
hello I have a backlight problem on this TV, if I unplug the cn201 cable the backlight works perfectly and the voltages are 13v if I connect the cn201 cable the backlight goes off and the voltage drops to 12v, I assume it's a motherboard problem, the question is has anyone had a similar problem? I want to understand if the motherboard is repairable or it's not worth wasting time... -
Hello Guys,
I received Toshiba Qosmio X755 that has a charging problem and I'm stuck trying to figure out the problem.
- When battery is unplugged i works without any problem.
- When I plug in the battery after plugging in the charger, it works correctly and the battery is charging.
- When I plug in the charger after inserting the battery, it stops working. ( voltage dropped and consumed 8A, reaching the maximum capacity of my bench power supply for 5 seconds, and stop working after )
Can you help me diagnose the problem? I have attached...
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