Mates PC was playing up with no signal error. Decided to replace his motherboard as it was getting on. Changed the m/b and tested it on an old monitor, perfect. He gets it home and it still shows no signal on his TFT. Have tried 2 different graphics cards, 2 different TFT screens, clearing the CMOS, everything. Stumped completely

 

I take it you've tested his TFT on a different base unit to rule out the fact that his monitor could be goosed???!!!

 

Tried 2 deffo working ones, so I guess that rules it out

 

So you've tried two working ones on the base unit & they dont work i take it???

 

Yup and graphic cards.

 

EIL I can't beleive I'm reading this as I had exactly the same problem just before Christmas with a 2 day old new PC !!!

We thought i was the monitor (TFT) and it wasn't, thought it was the graphics card wasn't it turned out to be the power supply and before you say it YES the lights were coming on, the PC was booting up but apparently the graphics card needs certain voltage and if it's slightly different the PC can swicth on boot up etc but if GC isn't get the right voltage it won't power the monmitor up strange I know but beleive me it cost me 50 quid to find this out and saved the whole PC being stripped again.

Got to be worth a try and sonuds uncanily like my fault.

 

Try turning colour and size down to basic stuff.

Could be out of range from one card to another.....in screen display

failing that.....

www.pcworld.co.uk

 

Cheers bud, got a spare PSU here. Will give it a go tomorrow

 

memory not compatible with new motherboard.

 

Stu, thats probably not the problem if the problem existed same as this before the new mobo was fitted, and reading this, it sounds like the problem is the same....

Got me stumped too mate - can't figure it out! Unless it is PSU as Chewy said...

 

Both DDR, he got new a one anyway

 

If its power related...

Take everything off the pc

HDD
FDD
PCI Cards
CD-ROM

See if it boots....

If it doesn't with just the gfx card and board then it could be that or somert else.

 

Odd thing was Dingy it booted fine with an old monitor, although it had been having trouble before with his TFT monitor, so maybe the PSU was on it's way out and just couldn't power a TFT. Give it a try anyway

 

Missed that.

If it powers the other monitor can't be the pc....

signal strength is tiny for a monitor....

 

make sure its set to TFT in the graphics card properties and not CRT/Dual/Auto detect etc

 

Impossible if you cant see it and even then it still uses the same HD/Windows so settings are the same

 

You know that if you've put a new motherboard in that you will need to reinstall windows, right?

The IDE controller etc will be different to what your previous installation was set up for. You can't take the drive with the operating system out of a pc and put it in a nother one and have it work fine just like that!

 

Not if you set the driver to a Std IDE driver before the mboard change. You can install the correct drivers after the new mboard is fitted.

 

ok are you getting POST eg the black and whit stuff detection of HD shit?

if not the Monitor is goosed, cable not right, main board not fitted correly eg not powering up

 

I have had this a number of times with different PC's here at work and once on my home one. I would also like to say there hasnt been a single fault the same every time.

It has been the monitor (BenQ 17" flat screen) twice, most commonly it is the graphics card slot on the motherboard that has blown, it has also been down to incompatible RAM or in the wrong slot(s).

I have one next to me at the moment with the same problem which is our accountants home PC and it looks to be the actual graphics card this time. The worst part for me is 4 and a bit years ago 60 PC's were purchased including ones for some senior staff, they are all now falling over inc the Servers

 

Usually with TFT's you need to set the refresh rate down to 50-60hz otherwise you wont get a picture. However I have seen monitors that wont respond to a lower rate. With situations like this I usually remotely connect to the PC with a util like VNC, http://www.realvnc.com/ and remotely set the display properties until I get an output to a screen.

 

Right, it worked fine on a standard monitor. Not a dummy so motherboard was set up perfectly. Not memory, graphics card, monitor, battery, etc. The only thing that sounds plausible is the PSU, so hope Dingy is wrong

 

I was going to say don't buy shit buy HP, but just had a DL380 corrupt 190 mail boxes on echange due a array failure. Took me all week end to restore it fooking piece of shit. luckerly we have 4 exchnage servers so not too maney people shouting

 

A std CRT monitor will support refresh rates far beyond what a TFT will support. Put it on the Std Crt and knock the refresh rate back to 60Hz, stick the TFT on again and try it.

 

The HD hasn't been touched, it is the exact same as it was also Windows. The problem occured whilsed using the old set up, but was deffo hardware prob as when it did load up I checked the set up. I only powered it up after fitting the M/B to make sure everything was fine and could get a picture. Was spot on

 

Sorry not following then. I thought you could get a picture on a CRT but not on a TFT?

 

I can, but it did that anyway. The problem became worse and decided to change the M/B as it seemed the only solution. The software hasn't changed, there was no need. It booted with the new M/B fine on the CRT same settings as before, but not with the TFT that was installed fine before

 

is it currently setup to work with your CRT and does it work ok with that?

if so, double check your graphics card settings, if your graphics card is set for a CRT monitor it WONT work with a TFT unless you tell it to before you plug in a TFT monitor, its a catch 22 situation, graphics cards dont always auto detect what you plug in to them.

Ive had this loads of times. By default, CRT is always the default monitor type.

with your CRT connected, set the graphics card to AUTODETECT the monitor, save, exit, swap monitors, reboot

if that dont work, manually set it to TFT, save etc...

 

Are you using dvi connection for the tft?

 

If it worked on a standard monitor its one of 2 things.

Drivers / settings
Fucked TFT..

Can't be the psu - that doesn't power the monitor the kettle lead does

 

we have had this at work, sorry to state the obvious but have you checked for bent pins in the VGA Cable?

 

still want to know if it shows the post screen,

without that info can't tell anything,

no post screen defo hardware, bend pins, not enough power to graphics card, ...

 

Blue screen with no signal error. Tried 2 different graphics cards, 2 different LCD monitors and it's got a new mother board. Going to try new PSU tonight anyway

 

ok, so you plug monitor in and it works 100%

you then plug the TFT in and the PC still boots etc. but no display on the screen?

not even when its POSTing etc.?

sounds to me like your GFX card is outputting a signal that the monitor cant display (most common when you try and set a refresh rate of say 70 on a 60hz tft, it just shows no signal

altho HOW you can do that before it even posts (as it should defalt to 60hz on startup) i dont know

 

Tried PSU, no joy, looks like the CPU was on it's last legs. Doesn't work with anything now.

 

Thought you knew about computers and us consultants were just consultants who knew nothing

Give u a clue Jim......

safe mode or boot from cd to console

 

dingy, BEFORE it posts you twat

 

U sure thats possible

 

I would say "during" POST or before POST completed.

 

jesus dingy, NOW you get the point

when it posts it should default to a a mode any monitor made after 1956 can display

so if it doesnt show the dos looking text stuff then my thoughts of refresh rate are not the cause

get it?