Wont boot up Acer aspire 5641

June 18, 2009 at 16:37:40
Specs: Windows Vista
Wont boot up cant even get the intial boot up. screen says no signal checked the power supply seems fine. there any way to check the motherboard and i need to know what kind it is i cant seem to find any info on this computer anywhere.

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June 18, 2009 at 19:48:25
The only "hits" I get for Aspire 5641 are for a desktop computer, and its in the M5600 series. There's probably a label on the case that has: M5641, or simlar on it.


You may have an Owner's or User's manual on the CD that came with the computer.



It's quite unlikely the mboard has failed - when a computer doesn't boot, it's almost always something else that is wrong, unless you just attempted to flash the bios and that failed (that can sometimes be recovered from).

If you HAVE changed which ram is installed in the mboard since it last worked correctly, not all ram that you might think is compatible with your system is compatible with it - in the worst cases of incompatibilty the mboard will not boot and may not even beep - it appears to be dead.
(e.g. this mboard can take a max 1 gb 533mhz or max 667mhz ram in each of the 2 ram slots - your mboard may not boot when you install modules larger than that, or 800 mhz modules)
If you did change which ram you have installed, if you still have the ram that was in it before when the computer worked fine, try installing ONLY that ram and see if your problem goes away.

OR if you don't have the original ram, or want to rule out incompatible ram....

Make sure you have a speaker or speakers or the equivalent connected to the mboard so you can hear mboard beeps (see your mboard manual if you need to).
Remove the AC power to the case/power supply.
Remove all the ram.
Restore AC power.
Try to boot.
If nothing else is wrong, you will get no video but you will hear a pattern of beeps that indicate no ram is installed, or a ram problem.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.

If you HAVE NOT changed which ram you have installed in the mboard just before this happened,

- A common thing that can happen with ram, even ram that worked fine previously, is the ram has, or has developed, a poor connection in it's slot(s).
This usually happens a long time after the ram was installed, but it can happen with new ram, or after moving the computer case from one place to another, and I've had even new modules that needed to have their contacts cleaned.

See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:

If that doesn't help....

- probably the most likely thing is the power supply is failing.

Failing power supplies are common and can cause your symptoms.
Check your PS.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
See response 4 in this:

If you want to confirm whether it's the PS, if you can borrow a known working ATX PS with at least 300 watts capacity and try that, do that before spending any money.

If it is failing, in most cases you can replace it with any decent standard sized standard ATX PS with the same capacity or greater.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Don't buy an el-cheapo PS.
See response 3 in this:

Apparently this series comes with onboard video and it also has a PCI-E X16 video slot. The PS according to posts on the web has only a 300 watt capacity.

If you have added a PCI-E video card to that slot, or have upgraded it if it already had one, or if you might upgrade it in the future, that 300watt PS capacity may not be enough.

Your power supply must have at least the minumum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD!)
You can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements.
If you want to cover any possible video card, a minimum 600 ot 650 watt power supply will handle any current high end video card, or even a X2 card (two video chipsets on one card) or two cards in two slots.

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