Lenovo 3000 no power after replacing the keyboard controller chip
I have lenovo 3000 with m/b part#: la-3451p, this laptop is working only with battery and not working on ac adapter i replaced the charging ic part# MB39A126 but still ac adapter not working after checking some components i saw keyboard controller chip part# ene kb295 it was burnt, then i replace that ic but after replacing when i try to power on again the laptop now its not powering on, even in battery now its no power. can somebody help me what to do next? help is very much appreaciated! thank you.
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Re: Lenovo 3000 no power after replacing the keyboard controller chip
maybe the ene that you put in is dead -
Re: Lenovo 3000 no power after replacing the keyboard controller chip
Hope i helped!Comment
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Re: Lenovo 3000 no power after replacing the keyboard controller chip
Make sure there were no soldering shorts!
Try measuring the resistance across the DC jack, there might be some short somewhere else on the motherboard...Muh-soggy-kneeComment
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Re: Lenovo 3000 no power after replacing the keyboard controller chip
and check all 8 pin power mosfets for shorts where power comes in from dc jack thus could have shorted the ic you replaced......Comment
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Re: Lenovo 3000 no power after replacing the keyboard controller chip
i tried to measure the voltage on mosfet lm393 pin5 beacause it was connected to B+ and resistor PR18 but its 0V but on transistor PQ1 which connected also to B+ the voltage is there. here i attached the scheme. i hope somebody can help me! thanksAttached FilesLast edited by goodbrethen; 12-15-2012, 02:35 AM.Comment
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Re: Lenovo 3000 no power after replacing the keyboard controller chip
The LM393 is often an issue. You have this chips on most motherboards. Try to replace.Comment
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This specification for the LENOVO 3000 J110 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the 3000 J110 boardview and 3000 J110 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for LENOVO 3000 J110...09-12-2024, 03:36 PM
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Lenovo 3000 Series Schematic
Lenovo 3000 was a line of low-priced notebook and desktop computers designed by Lenovo Group targeting small businesses and individuals. It was replaced with the IdeaCentre and IdeaPad brands.
3000 C100 laptop with Braille keyboard
Lenovo 3000 C
C100, C200 - 15-inch XGA screen
Lenovo 3000 N
N100, N200 - 14.1-inch- and 15.4-inch- WXGA models
N500 - 15.4 inch screen.
Lenovo 3000 V
V100, V200 - 12.1-inch WXGA models
Lenovo 3000 G
G400, G410, G430, G450, G455, G510, G530, G550, and G560...10-04-2024, 06:05 AM -
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