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computer on but no screen?


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8 replies to this topic

#1 shally429

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Posted 04 March 2009 - 09:52 AM

hi all,
my brother has a 1 y/o HP computer that was running fine. he went to turn it on and the screen is blank. he said it sounds on but theres nothing there. i had him unplug and plug everything back in and it didnt help. i had him hook the screen up to another computer and the screen is fine, so im assuming its the video card or something like that in the HP. any ideas on what i should tell him to do? he said its not overheated and he can see the fan going. i appreciate the help!!

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#2 sonya19

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Posted 04 March 2009 - 12:15 PM

Tell him to look at the little red switch on the back of the case. It is the 115/230 button. Make sure that it is set to 115 not 230. I had the same problem and I never thought that my son would be playing on the floor and switch it to 230.

#3 shally429

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Posted 04 March 2009 - 01:47 PM

i just called him and its set to 115. darn! lol i was hoping it was as simple as that!

#4 fairjoeblue

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Posted 04 March 2009 - 02:21 PM

My suggestion is the power supply has gone bad & fried the motherboard.
HP computers have rebranded "Bestec" power supplies.
Bestec power supplies are best known for going bad & frying the motherboard.
The computer will appear to start but nothing on the dcreen because the motherboard has been burned out due to overvoltage.

He MIGHT get lucky & fix it with a new power supply but I highly doubt it.

BTW, I have repaired many with the exact same problem.
I replaced the motherboard & power supply.
I didn't use a Bestec or HP power supply either !
OCZ StealthXstream 700W,Gigabyte GA-EP45-UD3R , E8500, Arctic Freezer Pro 7, 3GB G.Skill PC8500,Gigabyte Radeon HD 4850 OC [1GB ], Seagate 250GB SATA II X2 in RAID 0, Samsung SATA DVD burner.

#5 fairjoeblue

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Posted 04 March 2009 - 02:58 PM

Switching a PSU from 115 to 230 while it's plugged in usually dosen't work very well.
plugging one in that needs to be set to 115 & is on 230 usually doesn't work well either.
OCZ StealthXstream 700W,Gigabyte GA-EP45-UD3R , E8500, Arctic Freezer Pro 7, 3GB G.Skill PC8500,Gigabyte Radeon HD 4850 OC [1GB ], Seagate 250GB SATA II X2 in RAID 0, Samsung SATA DVD burner.

#6 shally429

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Posted 04 March 2009 - 03:18 PM

thank you! i will let him know. any specific brands you trust?

#7 the_patriot11

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Posted 05 March 2009 - 12:05 AM

Antec, OCZ, Corsair, and coolermaster are all PSUs I would recomend. :D

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Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

If I don't reply within 24 hours of your reply, feel free to send me a pm.


#8 fairjoeblue

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Posted 05 March 2009 - 12:26 AM

Many PSU's are made by the same co. & "rebranded"

It's getting a little dated now but here is a pretty good article about power supplies,

http://forums.nvidia.com/lofiversion/index.php?t4146.html

The "OKIA" brand is made by Broardway Computerco.
While not a well known or "top end" brand thet are fairly good,
I've been using them in budget builds for awhile.
I have never had one fail.
[I use the 450 Watt] .
If you are using a power hungry video card I wouldn't put one in the system but for average use they do well.
I have 1 computer that has been running almost 24/7 for over 3 years with one.
It has been through a few power outages while on with no ill effects.
OCZ StealthXstream 700W,Gigabyte GA-EP45-UD3R , E8500, Arctic Freezer Pro 7, 3GB G.Skill PC8500,Gigabyte Radeon HD 4850 OC [1GB ], Seagate 250GB SATA II X2 in RAID 0, Samsung SATA DVD burner.

#9 PcTestCard

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Posted 05 March 2009 - 03:26 AM

I would suggest swap the RAM in different slot and see if PC got the output screen.

Hope this helps!
Bill
Tech Manager
www.PcTestCard.com




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