Question about HP Pavillion a818n Desktop PC (Refurb) Pentium 515(2.93Ghz) 512MB 160GB (PS453AAR)

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How do I fix the NO Sync on my computer monitor?

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  • Jan Lerry P. Aquino
    Jan Lerry P. Aquino May 11, 2010

    Hi, this means that there is no signal from the CPU to your monitor.

    Was there any beep sound when you turn ON your monitor?
    How many beeps and was it a long or short beep?
    Is there a orange or green light on your Monitor?
    Is there a orange or green light on your CPU?

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  • Master
  • 635 Answers

Check your cable first.
You aren't getting a signal from your video output, so make sure the video card is seated on the motherboard.
If you have onboard video, then you may have other problems

Posted on Mar 09, 2010

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1. Loose VGA cable
2. Wrong driver installed or configuration made is out of monitor range

For loose cable you can fix it up from both ends, on CPU and on Monitor itself.
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Start computer in safe mode. To start in safe mode, as soon the system boots up press F8 and select Safe Mode. After you log into the safe mode. Right click the "My Computer" icon on desktop, go to properties,
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Picture is rolling


Pinout : Pin Name Direction Color Description
1 RED OUT Red Video (75 ohm, 0.7 V p-p)
2 GREEN OUT Green Video (75 ohm, 0.7 V p-p)
3 BLUE OUT Blue Video (75 ohm, 0.7 V p-p)
4 ID2 IN Monitor ID Bit 2
5 Gnd Ground
6 RGND Red Ground
7 GGND Green Ground
8 BGND Blue Ground
9 KEY Key (No pin)
10 SGND Sync Ground
11 ID0 IN Monitor ID Bit 0 GND=Color; NC=MonoMonitor ID Bit 0
12 ID1 or SDA IN Monitor ID Bit 1 NC=Color; GND=Mono Some systems only uses ID0 for monitor ID
13 HSYNC or CSYNC OUT Horizontal Sync (or Composite Sync)
14 VSYNC OUT Vertical Sync
15 ID3 or SCL IN Monitor ID Bit 3

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You can change these settings by right clicking on the desktop and clicking properties and they're under the settings tab. Change the screen resolution by moving the slider to the recommended setting (1024x768)

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