Hi guys could anyone identify replacement for this chip marked 89=4c 615
It is LCD inverter driver I believe
Thank you
It is LCD inverter driver I believe
Thank you
Attached Files
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I've purchased this weird (and might add appears to have had a fairly rough life) laptop a while ago for $1 at a yard sale. It powered up one time, (saw a POST screen!) Then, never powered again. I've since thrown it in some dark corner, BUT, I've decided to look at it again. First, this seems like a very obscure laptop, mine just has the name "BIT" on it and nothing else. Very similar (same?) can be seen here https://www.vogons.org/viewtopic.php?t=54655.
At first, I had gotten the weird mini display on the lower part of the laptop to display a few icons, but if I attempted...01-02-2025, 03:22 AM -
Hello,
first of all I want to apologize for my bad English, but I try to give my best.
Customer brought me a laptop, which is charging the battery (when the dc-jack is connected) but don't power up when the power-button was pressed down. Only the white LED lights up, and you can hear a short noise in same interval when power-button was pressed and hold for longer timer. The customer changed already battery and dc-power-adapter.
For this laptop the correct shematic is the service manual "Clevo NH50ER NH57ER NH50EPS NH57EPS - 6-71-NH5S0-D02 Schematic".... -
the comon problem they say , the charger will shut off power once plugged to laptop , i dont have battery, its long gone ago , i use it for backup with adapter and vga port to external monitor(yes no screen lcd) in case my desktop needs fix . one thing for sure i could say the clr resistor - r010 beeps ,short at both sides , the checked all the coils , the 3 coils together gives all of them beeps short along with their respective capacitors . i dont have voltage ampere injection dc machine as in videos i have seen they see where its getting hot and they remove the short and replace components... -
Hello Everyone!
I have an Acer Aspire A315-42 laptop. I generally leave it on for long time by closing down its lid (so it enters the sleep mode). Recently, it rained quite heavily in out area. And the humidity and moisture seem to be high. So one late evening, after I opened the lid and turned on the laptop, it did power on as the blue light turned on but after it booted to the desktop screen, just 5-10 seconds after both the screen and blue light went out and laptop shut down (the blue power light turned orange). And after 2-4 seconds that orange light went off and the laptop died....06-28-2025, 02:57 PM -
Hello i need help to fix this laptop,at least a discrete to UMA conversion if it's possible.
i took a photo of what i found,NVIDIA gpu side is 100% shorted as i desoldered power line coils and mosfet side is ok.
Even without coils laptop still not power on.Main power rails,bios,1v,3,3v and 5v are present...
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