Re: ASUS X54H laptop no backlight
I found out why the power button wasn't working properly. When I replaced the old power button ribbon cable I bought a ribbon cable where the contacts on either end are on same side while the original cable had a ribbon cable with contacts on opposing sides.
At that time I didn't realize that is an issue but I later did and once replacing the ribbon cable with the correct one the power button works like it should.
The connection has 6 pins and to power on the computer the two middle ones ie. 3 and 4 have to be shorted, so inverting...
flat-earther
Member
Last Activity: 08-20-2023, 01:08 AM
Joined: 12-20-2022
Location: israel
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Re: help repair Scorpion SC-6989 12v cordless impact driver
thanks for your replies.
I tested the mosfet LR8726 with one multimeter lead on the larger left metal part of it and the other alternately on each of the 3 smaller pins on it's other side, see photos where first measurement reads 0.3ohm, second 0ohm, third 84.8ohm. What do the measurements mean?
I tested the LED in diode mode and it reads 1.453 and reversing leads gives no reading. What do the measurements mean?...Leave a comment:
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help repair Scorpion SC-6989 12v cordless impact driver
Hi I got this [I]Scorpion High Quality Products[/I] model SC-6989 12v impact driver and the problem is it only runs on full speed and LED light doesn't light up.
I got the tool with two dead batteries and I already using the good 18650 cells from the two made one working battery.
Initially when I got it I once hooked up a good 12v battery to it and it powered up and LED worked but now depressing the trigger only makes it run on full speed or nothing so there's no variable speed, but to be honest I'm not sure if this tool has a variable speed trigger. Also LED doesn't light up anymore.... -
Re: ASUS X54H laptop no backlight
Hey guys, it's the next morning, and the blotchiness has disappeared completely! Thank God. Also thanks mon2 for your help.
I realized what caused it. It was my fault. I was cleaning the flux after soldering using ethanol with cotton swabs and toothbrush; but that was not the cause. The swabs and toothbrush were not enough because the flux spread to the LCD cable connector on the PCB and it interfered with plugging in the cable, so what I did was I held the screen tilted, put a piece of paper below hoping to catch overspray, and sprayed contact...Leave a comment:
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Re: ASUS X54H laptop no backlight
Greetings all.
I ordered a replacement capacitor and waited for it to arrive and it arrived recently.
I have now soldered the old and new capacitor, and new fuse.
Now there is backlight. But for some reason the light is blotchy accross most of the screen and it looks awful. Seems like something is damaged.
I wonder what caused that. Could I have caused that? I wonder if my handling of the screen somehow caused it. Tell me your opinion....Leave a comment:
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Re: ASUS X54H laptop no backlight
Thanks. Good cap capacitance measures about 2.3microfarad, reading doesn't want to settle and varies a bit(first it was 2.27 then a bit over 2.3), is that normal when measuring capacitance?...Leave a comment:
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Re: ASUS X54H laptop no backlight
Okay guys I have an update. I removed the two caps like mon2 told me.
I placed flux on the 2 caps and used my soldering iron with a ''hot knife'' tip which is large enough to melt the solder from both ends of the capacitor holding it beside it and then removed the caps with tweezers. It worked great.
After removing the caps, I measured resistance across the same PCB pads and there is no continuity or ohm reading at all.
Then I looked at the removed capacitors and noticed one of them looks damaged. I measured...Leave a comment:
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Re: ASUS X54H laptop no backlight
Okay, I wasn't sure so good to know, thanks....Last edited by piernov; 12-22-2022, 12:00 PM.Leave a comment:
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Re: ASUS X54H laptop no backlight
Greetings mon2
Okay, thanks for that information, whatever T-conn is. I'm not familiar with the parts on circuit boards, I barely can identify them so I need help on how to find the problem or how to check for a failed component. BTW if you or someone wants to have a Skype video call and help me live on how to check the components tell me.
I don't have a hot air gun to remove those caps but I have a ''hot blow'' tip for my butane soldering iron is that okay instead? Or better just use regular soldering tip.
I have rosin...Leave a comment:
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ASUS X54H laptop no backlight
Once upon a time I was casually browsing the World Wide Web with my ASUS X54H laptop which was sitting on my desk, when suddenly the screen turned black!
After several seconds, the screen turned on again! And so I continued to use my laptop as usual.
Some time later, the screen went black again! And it hasn't lit up since.
So here I am on a journey to repair it.
Not being an expert on how to repair, what I have done is searched the internet for help on a laptop screen not working, and I have checked some things.
I found out that with a flashlight... -
Re: New Members - please post your introductions here
Hi,
I want to repair my laptop & I need help, I found this site, so I created an account.
Something about me, I'm an anti-vaxxer, covid-19 denier and a flat-earther.Leave a comment:
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