Question about Motherboards
When I plug my adapter (wall to adapter plug) green light on adapter is ON. When i connect the adapter wire to the laptop...the adapter light is FLASHING.. and NO POWER sign in the laptop...
no power at all in the laptop. Called ACER Tech and he said my ac adapter is broken or not working.
If anyone has / had same problem let me know...changing adapter solved or not.
The problem lies with failed smd capacitors grounding out underneath the motherboard on the same side of the board as the cpu heatsink. if you look at the board with the heatsink/fan in the top right hand corner- the culprit caps are in the bottom right hand region under some see through plastic. they are labeled pc144 and pc145.
Posted on Jul 28, 2009
I have the sam problem except I could smell electronics burnout which I discovered to be PR8 (I think is a 20 Ohm resister located close to where the 19V adaptor plugs onto the motherboard). There are a few fets and diodes and regs in this regin. If any of these are shorted then you will get thissort of prob as well. I will check out these caps though!!
Any one know the value of PR8 for sure??
Posted on Dec 26, 2010
Does your laptop power up on battery power? Have you removed all external devices (external monitor, keyboard, mouse, any USB device or expansion card, etc.)? Can you remove the CD/DVD drive? Do you feel comfortable removing the hard drive?
First remove everything you possibly can and see if the power adapter works. If it does, try adding and testing the items one by one to see which is causing the problem.
If the laptop will power up with battery and not with A/C adapter, it is very likely the adapter is the source of the problem.
Posted on Jan 06, 2009
Tips for a great answer:
Take the battery out, plug in the charger and see if the laptop works.
If it works, the battery may be the problem.
Check the AC Adapter
Check to make sure the adapter is plugged securely into the wall outlet, connected firmly to the adapter box and to the back of your laptop.
Most AC adapters have a little light in them on that rectangular box in the middle of the cord that lights up when it's getting electricity.
If that light isn't on, try a different outlet.
Check your fuse or circuit breaker box and plug a different device into that outlet to make sure there is power to it.
If it still does not light up, your adapter could need replacing.
Also check the adapter box for signs of warmth, as it will generate heat when it's plugged in. No heat means no power.
Remove the Battery Sometimes it's as simple as a seated battery.
Remove the battery entirely and clean out any dust, lint or hair that may be clogging the connectors and preventing a proper connection.
Reseat the battery securely and make sure the little locking pins that hold your battery in place are securely fastened and there is no movement.
Check all power and data leads from motherboard to hard drive and all of your cd/dvd drives make sure connections are secure dust free and not faulty
computers need all power and data to travel through every working device and to finish its cycle
so any faulty lead will end in computer error or shutdown / fail to boot or to reboot on a cycle
make sure your computers RAM modules are securely seated with no dust in the sockets also the Cmos battery has charge and seated with no dust in the sockets
some motherboards cmos batteries are soldered in
might be getting hot check you CPU make sure its securely seated and has thermal grease
If you eventually get your computer to start download and install at least one of these all free depending on your operating system.
avg free 2012
microsoft security essentials your operating system must be registered
Win7/Vista/XP 64 bit
http://majorgeeks.com/downloadget.php?id=4281&file=1&evp=dbb3b0aebe6a6a4ff18089a6489a5e62 anti malware free edition Win XP/2003/Vista/Windows7
windows xp microsoft security essentials
windows 7 microsoft security essentials
Hope this helps.
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