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Hello and Welcome to Just answer. My name is John i will be assisting you today
Sir is this Acer aspire X3400 desktop PC?
Do you hear any beep sounds when you turn on the PC?
a very faint beep yes
Does it show acer start-up screen or just blank screen when you turn on the PC?
just a blank screen saying no signal abd the on button is flashing where usually it stays on
are you still there?
yes first make sure the signal cable on the monitor cable and on the back of the Tower is connected properly
yes have done all that
OK then unplug the main power cable
yep done that
then you need to remove the side panel of the tower
ok what then please
then you need to remove the CMOS battery in it.its a coin shaped battery on the motherboard
It looks like this
there is no battery like this inside I have checked
please check again because without cmos battery the pc wont save the bios.so its is there
it is located on the motherboard
no not there unless it is behind cd rom drive which i cant getout
That is strange.does this PC have any graphics card in it.which looks like this
so this is working on a on-board display.make sure that the signal cable from the monitor is connected to the motherboard VGA port or is it connected to a card which is inserted on the motherboard
also see if there any cards installed in the motherboard
i connect via a hdmi which is all ok plus no ards istalled in the motherboard
does it have a VGA or DVI port in it.like this
no just a vgs port and hdmi
no just vga port and hdmi
Do you have VGA cable.if so please connect and check it
no just hdmi- i know its not that as i have tested cable and on off button is flashing sll yht time which it doesnt normally
OK then there is only two chances left one is bad memory or display chip set.we can check that
remove the memory module in the motherboard.
sorry I cant they are situated right behind rom drive which I cant get out
there should a screw or a release lock to remove the Rom drive.
cant get to it I will have to leave it and take it to pc shop sorry
how many memory modules are there?
when you turn on the PC how many beeps do you hear is it a single beep or multiple beeps.
ok that is normal beep.does this flashing blue light shows on the monitor or the tower.
how many light indicators are there on the tower?
1 at the top
is this how tower back looks like
where is the HDMI cable connected to now.check the image and let me know the number marked on it
is it on the 1 or 7?
in hdni slot there is only one and it has been in there for a year and worked number 7
OK it seems like the onboard display chip is not working.you need to either replace the motherboard or you can add a new video card in the slot and use that
Is this pc still on warranty?