Re: Lenovo G580 Black Screen Adventure and Developments



Thanks! LCDVDD has 3.2kohm to ground with the screen and it's open without the screen. I'll have to find a replacement for that switch chip....

I [URL="https://www.badcaps.net/forum/showthread.php?t=61245"]posted about this earlier[/URL], but I've made some progress and I have more specific questions.

This is a Lenovo G580 Model 20157 with a LG4858 UMA MB. The MB part number is 48.4SG16.011.

The original symptoms were: Power button -> fan turns on, webcam light turns on, no gfx core voltage or video output, caps lock doesn't work. Eventually the fans stop and go again before the board powers down.

So I rigged up an [URL="https://github.com/bit2shift/serprog-due"]Arduino Due...

Re: Lenovo G580 Blank Screen



Capslock does not turn on the capslock light. I see the COL1 test point go from 2mV to 4mV when I press the capslock key so it looks like that signal is getting through.

Hoping it's not the PCH chip. I don't have the technology to do a reball/swap. ...

Hi all!

I have a Lenovo G580 Model 20157 with a LG4858 UMA MB and I was wondering if someone could help me troubleshoot it.

I have actually been given one of these before and it had the same symptoms--I press the power button and the webcam light, fan, and power light come on immediately. The fan stays on for about 9 seconds then stops. The fan will start again a minute or two later, stay on for a good while, then stop again. After this second fan cycle the laptop turns off. Throughout this whole process there is no video output. I don't have an external monitor to try,...

Re: Super Glue

I've used it on a pretty nasty cut before because I was unable to get to a hospital. It worked out pretty well with no scarring. The regular stuff is a little irritating and can burn. The medical formulations are supposed to be more pleasant. You never know what additives they stick in the regular super glue so I'm not sure if I'd use that for everyday cuts.

Re: New Members - please post your introductions here

Hello! I'm a 27 year old electrical engineering student with a passion for electronics. Mostly I'm here for help fixing a laptop, but I have a good deal of electronics experience so I hope to be able to contribute as well!