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HELP-Computer stuck on black screen with blinking white cursor

Adnan786 Avatar
banned5y, 9m agoPosted 5 years, 9 months ago
I realise this isnt a computing website, but the competence of many members on here probably surpasses those on dedicated sites, so i thought id give it a shot.

I would say my computing skills are at an intermediate level, but im really stuck with this problem.

Heres goes:

Computer POST'S, i see the bios screen (all details are correct) and then when the computer tries to boot, it doesnt go past the black screen with a white blinking cursor in the top left corner. Usually this will mean that the OS or some system files are corrupt or hdd has failed and at the worst case scenario you may have to reload windows or replace hard drive, but this isnt the case here. The nonsense thing about this problem is that now it wont even boot from the optical drive, it gets stuck on the same screen, so i doubt theres anything wrong with the hard drive either.

Things ive tried (in no particular order):

--Tried to enter safe mode-the option doesnt even come up, no matter how many times you hit f8

--reset bios (have a asus crosshair so did all three, removed battery, hit the clear CMOS button and changed the jumpers over) and restored defaults

--changed bios battery

--checked bios that it recognised the cpu, the speed, the optical drives, the 3 hdd's, their capacity etc-all are correct.

--removed both RAM sticks (computer doesnt post and makes the correct beeping noises-motherboard seems to be responding as it should)

--put one RAM stick in at a time-same results-tried different slots-same result

--disconnected all three HDD's and set the boot priority to optical drive-still the dismal black screen, white cursor (btw tried 3 different OS boot discs so its not the disc either)

--removed everything from the rear of the pc, except the vga and keyboard, removed all pci cards etc, only left the video card in-still the same problem

--changed over video card-same results

--changed over cpu-same results

--removed usb headers on motherboard

--unplugged all headers/cables and reseated everything-same results

--disconnected optical drives and then connected hard drive with OS-no change


I dont want to think its the power supply, because its only around 5 months old, its 600watts and i barely need 300 to run my system. The computer always starts first time, never struggles etc. I have no reason to suspect its my motherboard, but ive tested almost every other component and dont know what else to attribute it to (by power of deduction).

The last thing im going to do is download the latest bios update for the motherboard (version 1207-which the bios is currently already on) and i hope that the old one has become corrupt for some reason and updating it again will fix it. If that doesnt work, im all out of ideas and will have to bring out my sledgehammer.

So please guys, if theres anything ive overlooked or if you have suggestions or know of a different community you think may help, please let me know.

Cheers
Adnan786 Avatar
banned5y, 9m agoPosted 5 years, 9 months ago
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#1
Mobo is next!
#2
Also, are all the devices showing up in the BIOS? - I.E. Hard drives etc.
[Moderator] 1 Like #3
TBH It doesn't sound like a hardware problem... more of a windows startup issue.
Seems like your at the DOS prompt oO
banned#4
yep all devices are showing up in bios correctly-but theres no other indicators that the motherboard might be faulty-other then the fact that i havnt swapped it........may have to swallow my pride and take it to a local computer shop :(

bigflump-its not the DOS prompt-you cant type anything-also it cannot be a windows startup issue, as i have removed the drive containing the OS and put a bootable disc in the optical drive, and the boot prompt from dvd doesnt even come up.
#5
you tried the boot menu? f11 key on my system, on the same screen you would press key to enter bios.
#6
sorry read thru again and saw you have.
banned#7
Yep, tried boot menu, then tried each drive individually followed by hitting f8 frantically-hoping for something to come up-all in vain
#8
Have you tried booting from a live cd?
banned#9
hi danmc, i tried barts pe cd and UBCD, none of them boot on either of the optical drives (can hear them spin up etc and have used them before)

Edited By: Adnan786 on Mar 03, 2011 01:39
#10
Disable as much as possible within the BIOS, and strip it to a DIMM, CPU, mobo, PSU, videocard and monitor, disconnecting everything else. Even the keyboard. What happens then?
#11
A Crosshair eh! I have one of these stored away somewhere excellent motherboard.(_;) What does the lcd post say on the back of the motherboard? Also try switching the motherboard lights off as these can cause boot issues.
#12
Sounds like you have covered all the bases, my first guess would have been your mobo cant find a boot device, but after all you have tried I'd have to guess the mobo.
#13
Hmm. Odd one. Anything unusual in the 'PC Health Status' or whatever it is called in the BIOS - do you get rail voltages?

How did the problem manifest itself - when did PC last work fine, did it shutdown or crash, have you moved it about etc?

Carefully check the motherboard for anything untoward, bent pins, dodgy looking caps, broken/shorted USB-outs and other connectors on the back-panel, foreign matter or corrosion in the PCI slots etc.

Lots of things can cause it to hang at that point, but it sounds like you've ruled most of them out (you're 100% you've disconnected all USB etc..).

Edited By: jah128 on Mar 03, 2011 01:47
#14
Does the LED on the keyboard flash as the PC starts ?
#15
Damn, thats a point, you tried removing the keyboard/trying a different one?
banned#16
dxx
Disable as much as possible within the BIOS, and strip it to a DIMM, CPU, mobo, PSU, videocard and monitor, disconnecting everything else. Even the keyboard. What happens then?


Thats all thats attached-one ram stick, video card, cpu, psu, vga monitor. Ill try removing the keyboard and getting back to you


trog0
A Crosshair eh! I have one of these stored away somewhere excellent motherboard.(_;) What does the lcd post say on the back of the motherboard? Also try switching the motherboard lights off as these can cause boot issues.


Hey....it said "updt dmi" the last time i checked at the black screen, tried chasing it up but most places suggested it happens automatically. Also from past experience, the lcd poster is quite temperamental.

Are you talking about the blue leds on the motherboard? i didnt think you could even boot with them on....they are off anyhow :), i dont want to have to replace a crosshair with all its premium features :(


jah128
Hmm. Odd one. Anything unusual in the 'PC Health Status' or whatever it is called in the BIOS - do you get rail voltages?

How did the problem manifest itself - when did PC last work fine, did it shutdown or crash, have you moved it about etc?

Carefully check the motherboard for anything untoward, bent pins, dodgy looking caps, broken/shorted USB-outs and other connectors on the back-panel, foreign matter or corrosion in the PCI slots etc.

Lots of things can cause it to hang at that point, but it sounds like you've ruled most of them out (you're 100% you've disconnected all USB etc..).


I can see the rail voltages and tempreture etc in my bios. One day i switched off my computer as normal and the next time i switched it back on, i experienced this problem. I havnt made any changes to my system recently-software, hardware or otherwise. A few days before that, the computer got stuck on the same screen, so i restarted the computer, pressed f8, entered boot menu, selected the hard drive with the OS on it and it loaded fine after that and everytime i switched on the computer after that, until saturday.

Ive checked the caps, etc since, a few years ago, i had bulging capacitors which rendered my motherboard useless.

I only had one usb header attached to the motherboard, the front panel one, the others were either on pci cards (which ive removed) and the ones attached to the motherboard itself




Silentone
Does the LED on the keyboard flash as the PC starts ?


Yep, then switches off and then turns on again when it gets to the black screen and jams :(

Edited By: Adnan786 on Mar 03, 2011 02:19
banned#17
jah128
Damn, thats a point, you tried removing the keyboard/trying a different one?


keyboard seems to be working fine-i.e, up until when i was last using it on the computer, even now in bios etc, it seems to be responding fine.....
#18
Also is it a sata dvd? if it is to boot from it you may have to press f12 or is it f8 and select the model name rather than the cdrom option.

Edited By: trog0 on Mar 03, 2011 02:24
#19
jah128
Damn, thats a point, you tried removing the keyboard/trying a different one?


Yeah good point I had that problem a few years back.
#20
Still worth trying another, I guess a key could be stuck or something which might still let it work in bios but not go further. Unlikely, but worth a try, you've tried pretty much everything else!
banned#21
dxx-when i remove the keyboard and switch the computer on, the post beep goes off twice instead of just once (i.e first time when its on bios info page and second time just before the screen changes to the black screen with cursor)
banned#22
i have 2 optical drives, both are IDE (the only thing ide on the computer). Ive tried swapping the discs between both drives, and ive also not only relied on it to automatically boot from "cd rom", ive actually loaded the boot menu and selected each of the optical drives individually, to no avail. I dont have a spare keyboard to try, but usually a sticky key would produce perpetual beeps from past experience.

Guys, if it does turn out to be the keyboard, can anyone recommend a DDR2 AM2+ board with similar features as the cross hair (lcd poster, external sata, 6 internal sata, 8 gb ram capacity) and a reliable brand. And would it be unethical to buy a new motherboard and return it if the problem still persists?

I know theres one more thing that i havnt tried, to mount the motherboard outside the computer on a card board or something, but that seems like a daunting task right now, with low yielding prospects of rectifying the problem?
#23
I see you have tried all of the above,ok. Try this as its booting up hold down SHIFT and F11 and pressing DELETE when you hear hdd spin (if its still working that is) then follow comand prompts below

Flush bios link for XP service pack 2




Edited By: simplex on Mar 03, 2011 04:25: given link wrongly for service pack 3
banned 1 Like #24
Hi simplex, thanks for replying, ive just tried swapping the video card from one pci-x slot to another, just incase, did not work either. My head feels like its going to explode right now lol, i will give your suggestion a try tomorrow and reply accordingly.
1 Like #25
Adnan786
Hi simplex, thanks for replying, ive just tried swapping the video card from one pci-x slot to another, just incase, did not work either. My head feels like its going to explode right now lol, i will give your suggestion a try tomorrow and reply accordingly.


Hey.... No problem. Best thing to do is give it up for tonight and tackle it in the morning. If all fails beat it to a inch of its life... then beat it a further 2 inches to make sure, follow comand prompts and post vid

Edited By: simplex on Mar 03, 2011 04:02
banned#26
That will actually make me feel better....will also detonate it for good measure :)
#27
It might be slightly harder to reboot after this, just a warning
#28
danmc
jah128
Damn, thats a point, you tried removing the keyboard/trying a different one?


Yeah good point I had that problem a few years back.


Me too, its always the last thing you think of, if at all, I only found out after I had punched my keyboard in frustration and had to dig a spare out to continue trying to solve, as soon as the new keyboard was plugged in it booted straight away!
#29
Have you tried with the inbuilt graphics card on the mobo? It could be that something has caused the slots to fry.
#30
You said you took out the HDD and just tried to use the ODD to boot, Why not try just using the primary IDE on the computer and connecting just one hard drive and one disc drive on CS setting, jumpers can cause an issue sometimes. See what happens?
#31
disconnect the case power and reset switch from the mainboard and use a small screw driver to bridge the power on points.
banned#32
harlzter
danmc
jah128
Damn, thats a point, you tried removing the keyboard/trying a different one?


Yeah good point I had that problem a few years back.


Me too, its always the last thing you think of, if at all, I only found out after I had punched my keyboard in frustration and had to dig a spare out to continue trying to solve, as soon as the new keyboard was plugged in it booted straight away!


Im going to go to pc world tomorrow and get a new keyboard, but i doubt it will change anything, as i disconnected the keyboard and tried to boot and it still got stuck on that darn screen :( but ill give it a shot


harlzter
Have you tried with the inbuilt graphics card on the mobo? It could be that something has caused the slots to fry.


Hi, the crosshair doesnt have an inbuilt video card, so thats not an option im afraid

aircanman
You said you took out the HDD and just tried to use the ODD to boot, Why not try just using the primary IDE on the computer and connecting just one hard drive and one disc drive on CS setting, jumpers can cause an issue sometimes. See what happens?


Whats CS setting? What ill do is connect only the master ide optical drive and the sata hdd that contains the os's on it and ill see what happens.

maddogb
disconnect the case power and reset switch from the mainboard and use a small screw driver to bridge the power on points.


hi, i disconnected the front panel pins from the motherboard days ago. Ive been using the on/reset buttons on the actual motherboard for all the testing (same as shorting the 2 pins pins, but because the motherboard is designed for gamers and ****, they just put dedicated, illuminated on, reset and reset CMOS buttons on the motherboard)
banned#33
whats wrong with the word "OVER CLOCK ERS ? It starred it out

Edited By: Adnan786 on Mar 04, 2011 00:59
#34
Lol. The OVER******** shop is banned for multiple breaches of self-promotion I believe; it must have been pretty bad for them to add it to the swear filter...

Does sound like a new keyboard probs won't help unfortunately. Have you really carefully checked all the ports at the back and internally for any possible shorts?

Edited By: jah128 on Mar 04, 2011 01:35
banned#35
ah..that explains it........(more like they were probably not giving enough or scamming huk out of comission)

Yesterday i turned the case around and went through the back with some pliers, made sure the back panel wasnt touching any ports. I also attacked the whole compuer/fans/cards/psu etc with a can of air duster aswell.

I dont want to spent £70 + on a new motherboard, unless i know its actually at fault, so im going to at some point take it out to take to a local shop, so they can test it with their power supply, so i guess while its out of the case, i may try to give it a go on a cardboard, outside the case, just to rule that out aswell.

I have shorted the motherboard out several times (computer switches on for a few seconds then power cuts out) accidently by putting pressure on the board whilst slotting in ram, pci cards etc, but thats usually solved by pulling the motherboard upwards using the heatsink (strange considering the motherboard is mounted on standoffs). Thanks for your input.
#36
Adnan786

Im going to go to pc world tomorrow and get a new keyboard,


You must be the only person I know who can build a PC but doesn't have a box of spare keyboards I keep finding more in our loft, the same with mice even though I haven't used one for about 5 years! I often get a call asking if I have a spare from friends.
#37
CS, cable select. Have you tried the jumpers on all the drives. If they are not SATA then you will need to change the jumpers accordingly!! And if they are wrong this sort of thing can happen.
banned#38
Hartzler, the last time i had a clearout, i got rid of allot of things that were inexpensive and that i didnt think id need the use of again.

Aircanman, yes cable select, im with you. The jumpers are in the right place as i have booted from the opticals over the past few years without ever needing to change the jumpers, even with my existing configuration, ive formatted my computer almost a dozen times. In bios, i can clearly see which optical drive is the master and which is the slave. What i will try however is disconnecting one of them and putting the other in CS and then try it with the slave one aswell.
banned#39
Hey guys, thanks for all of your input and help.

The computer is now booting and neither the motherboard nor the psu were faulty, so i didnt end up replacing anything.
banned#40
The issue is resolved now, thank you all who tried, the culprit wasnt anything that i would have suspected and therefore didnt check for it when trying to identify the problem. Basically it was the bios chip on the motherboard, it wasnt faulty but for some reason was causing the boot issue.

After exhausting all possible logical steps, in desperation i decided to reflash the bios but when i tried it kept getting stuck on rewriting the block, so i had to manually switch the computer off. Then, intermittently, i kept getting BIOS ROM errors, stating the following:

Award BootBlock BIOS v1.0
BIOS ROM Checksum error
Detecting Floppy drive A media
INSERT SYSTEM DISK AND PRESS ENTER

so i thought the bios chip may have to be replaced, so to see how easy it would be to replace, i just tapped on it and ran my finger on it. The computer then booted fine and has done ever since. Amazing. I have since been able to reflash the bios sucessfully, so i am inclined to think that little tap on the bios chip must have aligned contacts or something. The bios chip isnt loose or anything, so it was a lucky discovery, i was actually looking into a replacement board.

I havnt put everything back together yet, but im hopeful that this issue is resolved.

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