PC To TV Via HDMI - No Signal?

Jul 27, 2012

When I connect my PC to my TV Via HDMI Cable, my TV does not receive a signal. When I check in Control panel>Display>Resolution, My TV hasn't even been detected. My TV is an LG 50", Card is a GTX580, and my OS is Windows 7.

Also, when I connect my laptop to my TV via HDMI (Also on Windows 7), It is instantly recognised and automatically displays, so it has to be an issue with the PC itself.

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I just bought a new pc :

Intel quad core i5 3450 3.1 GHz socket 1155 Ivy Bridge
mobo AsRock H77 PRO4/MVP
psu XFX Pro 550W
8gb ram Corsair Vengeance LP
HD WesternDigital Caviar Blue 500gb
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Monitor: Dell U2412M 24'' 16:10 1920x1200px

I attached the monitor via dvi cable and I'm using the integrated graphic card (Intel HD2500) My problem: yesterday the power went out (without problems for me, because I've got an UPS) but after this, when I turn on the pc, after booting (after windows 7 logo ) I got the message ''enter power save mode" on my screen and then it entered in sleepmode because there isn't signal

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I tried to boot another pc (with windows XP) to my screen with the DVI cable and it worked perfectly ...so I do not think it's a problem of DVI cable or a problem of the monitor

But If I attach a dedicated video card (I have a Radeon HD 5450) and if I leave the DVI cable attached to dvi output of the integrated video card (Intel HD2500) now there is signal after booting, but there is no signal during booting (till windows logo) ...the opposite!!

ps I installed the latest drivers of Intel HD2500 (version 8.15.10.2696)

pps if I use DVI cable with the dedicated video card (HD 5450) there aren't problems, so I think I'll use this card (or another dedicated vga) ...but I want to understand what's the problem with integrated video card

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I am experiencing a very disturbing issue with my newly installed ATI 4870 and my Windows 7 RC (7100). Prior to installing this card I had the following setup, which worked flawlessly.

nvidia 8800gt

intel p35 chipset in the motherboard

Samsung a656 40" LCD connected via a DVI to vga connector.

When I got my 4870, I uninstalled the nvidia drivers,rebooted, installed the latest (9.5) ati drivers and rebooted.

Then, I got a no signal in the monitor at the windows login screen.

Mind you, that when I (dual) boot in Vista, using the 9.4 drivers, everything is fine.

Things that I tried:

1. Creating a new monitor.inf file (located at the windows folder) using info from a post in this forum.- This should not make a difference, since I was using the same monitor.inf file in the same windows 7 installation, whitout any issues before I installed the 4870.
2. Changing the ATI .inf file to include only one resolution for the r7x cards 19 20 10 80 00 00 00 60- I think it sould be a refresh rate issue, since the vga port of the TV supports many resolutions, including 1600x1200 etc.

- It could also be an unsupported resolution, if the ATi driver cannot detect the monitor correctly.
3. Installing the windows 7 default ATI driver.

Things that I noticed:

1. I can login only in safe mode.

2. Low res mode (640x480) gets me to the login in screen, but as soon as I input my passowrd, I get no signal.

3. Changing DVI ports in the 4870 (it has 2)

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Dec 6, 2009

I have new Acer Aspire 5739G laptop and fresh Windows 7 on it.

The wireless card is Intel WiFi Link 5100.

The problem is that wireless works only in short distance with access point - max distance is about 5 meters.

In that distance everything works fine.

But if I go farther or to another room it disconnects.

With other laptops all works fine even on very large distance.

I tried such things (nothing helped):
* uninstall, reinstall or update drivers
* install newest drivers from Acer site
* install newest drivers from Intel site
* tested with xp & vista drivers
* on network connection properties unchecked all things except tcp/ip v4 protocol (microsoft networking,sharing, link layer topology,QoS, TCP/IP v6 ..)
* disabled homegroup
* on adapter properties changed signal frequencies (1,6,11),
* on adapter properties changed standard type to work with: 802.11 b or g
* on adapter properties changed signal to MAX, don't use power saving
* disabled Internet security, firewall
* Changed access point signal broadcasting with no encryption or wpa
* it disconnects from another access point the same way (problem with system not wifi AP)

Maybe something forgot to say, but there was few hours of testing and can't fix it .

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