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Question

Samsung DP700A7D won't start after Bios Default Settings

Apr 10, 2016 5:35PM PDT

Hi everybody, I have a "small" problem with my all in one Samsung DP700 27", it was downgraded to windows 7 without any major difficult, it was working perfect for more than one year, yesterday I tried to reinstall the original 8.0 OS with the OEM recovery disc, before do it I reset to default the Bios settings, after that it simply doesn't start, no F2 message at the start up, just black screen for few seconds and than the backlight goes off and nothings more happen, power light stays on and in order to power off I need to keep the power button pressed.
I already tried to remove the power cord and press the power buttom, remove the RAM, remove the Button cell battery, reset the bios via RTC jumpers, but there is no way to restart it.....
Please help me if you can..... Grazie, Fabio.

Discussion is locked

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Answer
While this is not your exact model
Apr 10, 2016 6:22PM PDT
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no hope
Apr 10, 2016 8:03PM PDT

thanks for your reply, I tried to remove the HDD and restart but same like before, tried to connect the hdd via USB, same story, I formatted a new HDD as GPT, same stuff...... I think I need a new MB

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Try one more time.
Apr 10, 2016 8:17PM PDT

Do not format the HDD. Make it a blank drive without partitions or boot information. By formatting you can trip up these machines.

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no way
Apr 10, 2016 8:49PM PDT

before format as GPT, I "cleaned" the HDD via Command Prompt, same problem...

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Tell me about this cleaning.
Apr 10, 2016 9:00PM PDT

Because how fast start works on some machines, well, I always start with a blank (zero fill) HDD when the above happens. Or without a HDD to force the PC to tell me more, let me into the BIOS ect.

One of the tricks you also pick up is to hold down the bios key and then power up. Don't let go till it beeps in protest or you get a prompt.

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no response
Apr 10, 2016 9:13PM PDT

there is no sign of life on the keyboard, led didn't flash or light on if Num Lock is activated, I already tried with different wireless keyboards set, now I'm using an USB keyboard, seems the bios didn't recognize even the graphic card, I tried to unplug the white video display ribbon, display light on for 4/5 seconds but stays black, after backlight goes off...
there is any way to flash the bios from an USB drive?

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This is sounding bad. Did you?
Apr 10, 2016 9:18PM PDT
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3 volts
Apr 11, 2016 9:25AM PDT

3 volts as should be

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That's without a load so might be low.
Apr 11, 2016 9:35AM PDT

I'd want to see over 3. Here's a video about how to measure the CR2032 and you see why I just replace any at 3.0 or lower.


Sorry, no, I'm not saying this is it, but it's a possibility and a cheap thing to change and when it works, you learn to always try it.

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Motherboard
Apr 11, 2016 2:16PM PDT

Replaced button cell battery with a new one, no luck...
I just spoke with a real computer technician, he told me the jumpers I short to reset are not the one for the bios but the RTC, but I'm still looking for the CMOS reset jumpers on the motherboard.
How I can post an image here?

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Without CMOS battery or power.
Apr 12, 2016 8:30AM PDT

You can short whatever you feel can be a jumper without ill effect. It also won't have any effect. At least it hasn't here in decades (I ran PC repair shops many years ago.)

We've given it the good try. Now try unplugging what else unplugs (memory, CPU?) and plugging those back in as more last hurrahs.

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Secure Boot
Apr 12, 2016 6:12PM PDT

nothing's I reinstalled the MB, but is still like before, could be a problem with Secure Boot? I try to explain, windows 8.1 was the OEM OS installed from factory, more than one year ago I disabled the Secure Boot in BIOS in order to install Win7, last week I decided to reinstall Windows 8 to upgrade to 10 but there was no way to install from the recovery disc , that's why I reset to default the Bios, but after the first start up with still Win7 on the HDD and Secure Boot on my I messed up the system......

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Answer
This is looking grim but
Apr 12, 2016 6:20PM PDT

Does it ever show a video screen or any indication of the Samsung bios, ANY message at all?

Post was last edited on April 12, 2016 6:23 PM PDT

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No
Apr 12, 2016 8:43PM PDT

No, just black page with backlight on for few seconds and HDD led flashing, after backlight off but HDD and fans spinning, hot CPU, north bridge and video chip......

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Then the last thing.
Apr 13, 2016 8:14AM PDT

Set it up but without the WiFi card, one stick of RAM and no HDD. Any sign of life?

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No change
Apr 13, 2016 9:07AM PDT

Same stuff, the strange is this, without ram to switch it off I just push the button, with the ram I need to keep the power button to power it off, their means the MB is alive...

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To me this means
Apr 13, 2016 9:15AM PDT

It booted and crashed. That's not what a good MB would do.

Sorry but we've given all the usual last chances so it's time to decide if it's worth repair. The board might be at samsungparts.com

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New MB
Apr 13, 2016 9:20AM PDT

I found it for about 270$, I even found a similar of with broken screen for 400$, but the guy is selling is telling me when he power it in he can't see anything in the screen because is broken.... Fishy