My acer aspire m1640 tower with n1996 motherboard will not open on the monitor, the psu, hdd, processor fan are working so there is power to the motherboard, the vga cable is fine and the monitor is working but when i connect this motherboard to the monitor it just comes up with no signal, i have also renewed the motherboard battery it still does the same. any help out there please

The Acer Aspire L100 is a desktop computer powered by a special DC adapter and power cable. The computer's motherboard incorporates a fuse designed to prevent any power surges from damaging the computer. If the fuse burns out due to a power surge or for any other reason, the computer will no longer function. You can check the motherboard fuse for damage yourself, then take it to a trained technician for replacement if needed

Shut down the Acer Aspire L100 and turn the tower around.

Press the "On/Off" button on the front of the tower. If the computer will not boot and the fan does not turn on, the fuse may be burned out.

Unplug the power cord from the rear of the tower

Turn the tower on its side and remove the Phillips-head screws connecting the back panel to the Aspire L100's cabinet.

Pull out the motherboard assembly gently from the back of the cabinet. The internal fuse is located on the motherboard behind the DC power jack, which is to the right of the monitor jack

Let me know if this helped..

2 Press the "On/Off" button on the front of the tower. If the computer will not boot and the fan does not turn on, the fuse may be burned out.

3 Unplug the power cord from the rear of the tower.

4 Turn the tower on its side and remove the Phillips-head screws connecting the back panel to the Aspire L100's cabinet.

5 Pull out the motherboard assembly gently from the back of the cabinet. The internal fuse is located on the motherboard behind the DC power jack, which is to the right of the monitor jack.

Read more: Fuse Location on Acer Aspire L100 ' eHow.co.uk http://www.ehow.co.uk/how_7815704_fuse-location-acer-aspire-l100.html#ixzz1XUVwmxuA

3 Unplug the power cord from the rear of the tower.

4 Turn the tower on its side and remove the Phillips-head screws connecting the back panel to the Aspire L100's cabinet.

5 Pull out the motherboard assembly gently from the back of the cabinet. The internal fuse is located on the motherboard behind the DC power jack, which is to the right of the monitor jack.

Read more: Fuse Location on Acer Aspire L100 ' eHow.co.uk http://www.ehow.co.uk/how_7815704_fuse-location-acer-aspire-l100.html#ixzz1XUVwmxuA

Acer computers are known to have low quality Power Supply's.
The one in your Acer could have a weak voltage power rail. No, not something that is easily fixable. It's more intelligent to replace it with a KNOWN to be good, Compatible power supply for a test.

1) Monitor not detecting.
In otherwords, No Signal. No video signal because the computer isn't working. LED lights may light, perhaps fan/s spin, but there isn't enough power to turn the Processor on.

A) ALL of the LED lights on at once use less than 1 Watt of power.

B) EACH fan uses 2 to 3 Watts of power.

C) A typical Processor can use 51 to 125 Watts of power. Just depends on what Processor it is.


Intel Pentium Dual Core E2160? Can use Up To 65 Watts,

http://en.wikipedia.org/wiki/List_of_Intel_Pentium_Dual-Core_microprocessors#.22Allendale.22.2C_.22Conroe.22_.2865_nm.29

[ TDP = 65W
Thermal Design Point.
65 Watts ]

Known to be good, Compatible power supply:

The Acer M1640 desktop computer just uses an ATX form factor power supply. The kind installed in over 80 percent of desktop computers out there.

Form Factor is a term used for motherboards, but has gone on to other various computer parts.
It refers to the size, and shape of the Power Supply's case, and the power cables the power supply has.

Size and Shape:
Approximately 6 inches Wide, 5-1/2 inches Long, and 3-1/2 inches Tall.

Power Cables:
1) 24-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

2) 4-pin ATX +12 Volt power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

3) Should have at least 2 SATA power cables.

4) Should have one 6-pin PCI-Express power cable.

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress

5) Two to Four, 4-pin ATX standard Peripheral power cables,

http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral

{Misnomered as Molex. The name Molex stuck, just like Crescent wrench did for an open-end adjustable wrench }

[ The links to power cables above are part of a main page. Scroll up to the top of the page, and click on the photo - SATA power cable, for more info on SATA power cables ]

Perhaps there is an unused computer, that you can borrow it's power supply for a test unit.
The Acer M1640 just uses a 250 Watt power supply. (ATX form factor)

(If the power supply has more Wattage it's okay.
A Computer ONLY Uses the Power it Needs, and No More.

If you installed a 10,000 Watt power supply, {Exaggeration}, and the computer only needed 100 Watts for what it was doing, it would ONLY use 100 Watts, and No more )

Would like to hear back from you. Post in a Comment.

Regards,
joecoolvette

There are a few options you have on this, but if you want to maintain full compatibility with your current hardware, then you must purchase a motherboard that supports DDR2 533/667 MHz SDRAM since that is what comes standard in Acer Aspire M1640 Desktops.
A few options that would be similar to stock motherboard would be:
Foxconn G31MXP-K I7 or Biostar TForce TG31-A7
Those motherboards have similar specs to the stock motherboard and you can take a look at the specs of the Acer Aspire M1640 from this link below:
http://support.acer.com/acerpanam/desktop/0000/Acer/AspireM1640/AspireM1640sp2.shtml
Both those motherboards I have linked you too are microATX boards, which should fit fine in your case which may be a standard ATX case.
If you are willing to upgrade your ram, then your options open up to any motherboard that supports the Intel Pentium Dual Core processor. Since the stock motherboard also provides onboard video, chances are you don't have a video card plugged into your motherboard (unless you've upgraded that yourself) which means you should also look for a motherboard that provides onboard video so you don't have to purchase a video card.


Good luck!

black out can be caused by series of things. Power supply is one. Second is the motherboard, memory and the processor aside from the video card. Motherboard and processor can be isolated,first is to remove the rest of the devices such as hard disk and cards and memory. Beep sound means your board is still doing fine. Re install all the devices and power on again. Good luck

i found the same problem (can't load BioS) but we are not alone as you can see on web about M1640 and M1641 it's very popular defect
I made various test:
cpu (pentiun e2180) pass the test mounted on another PC.
I removed the two ram and replace with other ,result nothing (Pc power on but can't load the BIoS).
Some of this Acer model have this motherboard crash
look also here
http://www.tomshw.it/forum/schede-madre-e-ram/129267-scheda-madre-non-da-segnali-di-vita-microstar-n1996.html

http://www.tomshardware.co.uk/forum/271665-12-motherboard-problems-m1640

http://www.fixya.com/search/p954810-acer_aspire_m1640_refurbished_intel_desk/acer_aspire_m1640_fast_ddr2

http://www.tomshardware.co.uk/forum/270660-12-acer-motherboard-sak09-replacement
Change the MotheBoard

No it will not. The motherboard has voltage regulators which correctly distributes voltage through the integrated circuits to the chips/capacitors/etc. that need power. The only reason you would need a stronger PSU with more output wattage would be if you had lots of internal parts that drew a lot of power (such as 4-way SLi cards with power adapters plugged in, sound card, 4 hard drives, 4 optical drives, TV tuner, lots of fans, etc.). A setup like the one I just described would probably need at least a 750 watt PSU. But in any case, you could have a 2000000 watt PSU and it would not fry the board due to the reasons above.

YOU MAY HAVE A BAD MOTHER BOARD

unplug everything for a few hours and let it drain. then go into bios and turn off all power save settings.

your monitor power light is on? lcd?
maybe a backlight issue?
have you tried a different monitor?
if the pc is booting up it may be the monitor, if your pc is not, yes it could well be the processor or the motherboard itself.

HI

Please change the smps your cpu and check it..

i'm sure it will work..