Go Back to: Homepage     ACEPC AK1     ACEPC T9     ACEPC T11     ACEPC W5     ACEPC W8 PRO     ACEPC Bluetooth Headphones     ACEPC P1 WiFi Digital Photo Frame

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Blue light not working; BIOS forgot SSD
#1
The ACEPC AK1 with Windows Pro that I received last week has suddenly done two things:

1. The blue light that shines from the vents and indicates power-up is no longer working.

2. At the same time that the blue light stopped working, the machine also refused to boot up to the copy of Windows on the SSD I had installed. (Copied with Macrium, and had booted several times since then.)   Instead the screen displayed attempts to boot to other options on the BIOS's list of boot entries (unsuccessfully), though it never made it to the Windows Boot Manager entry corresponding to the internal eMMC. 

(I had moved the eMMC down the list in an effort to avoid accidentally booting from eMMC (and me not noticing) if the SSD failed for some reason. That probably contributed to complete lack of boot when booting did not occur from the SSD.)

I addressed the no-boot problem by:

a. Remove the SSD to see if that would cause boot to eMMC. No it did not (again, possibly to be expected with the eMMC being far down the list).

b. Plug the SSD back in.

c. Start up into the BIOS by using DELete key.  <-- That's vital info: DELete, not F2 as mentioned some places.

d. Inspect the boot entries list, where I noted that the SSD was not at the top of the list (possibly because I had powered the PC up with the SSD removed. So I reinstated the SSD at the top of the list.

e. Boot up successfully to SSD.

So, the booting is "fixed"... but why did it fail in the first place?

The blue light continues not to work.

At this point I do not know if the two issues (blue light off, episode of not booting from SSD) are related or not.

I have seen other reports of the AK1 suddenly not booting from an SSD, but not enough details to know whether that was due to BIOS boot list getting messed up, or the SSD taking too long to become available, or something else.

Any comments?  I suspect the blue light not working is an actual electrical fault, unless there's a setting for blue LED brightness somewhere.

Graham
Reply
Like, Comment and Share Our Facebook: https://www.facebook.com/acepconline/
Join Our Facebook Group: https://www.facebook.com/groups/acepcminipc/
#2
The problem of the SSD seems to be a bad connection of the USB C connector of the expansion. The same happened to me two times. If you disconnect it and reconnect again, everything works.

With regard to blue light, have you tried to open the ACEPC? There a small connector that connects the leds to the mainboard. Disconnect and reconnect it.
Reply
Like, Comment and Share Our Facebook: https://www.facebook.com/acepconline/
Join Our Facebook Group: https://www.facebook.com/groups/acepcminipc/
#3
(08-20-2018, 05:13 PM)sebvalmont Wrote: The problem of the SSD seems to be a bad connection of the USB C connector of the expansion. The same happened to me two times. If you disconnect it and reconnect again, everything works.

With regard to blue light, have you tried to open the ACEPC? There a small connector that connects the leds to the mainboard. Disconnect and reconnect it.

Thanks for the suggestions... maybe in the right directions.

Investigation:

1. On disassembly of the "expansion module", I noted that its USB C plug protrudes at a noticeable angle.  I don't know whether this has anything to do with the original symptom, but it could contribute to unreliability of the contacts through that connector, given that neither side of the connector is free to move.

The plug angle is due to its small carrier PCB being mounted on plastic posts that are of uneven length. I have shaved the longer of the two to make that even. Not sure if that will make much difference.

2. The non-operation of the blue light is more straightforward. The blue light is provided by a small daughterboard in the lid of the unit, one which are mounted two Blue-Red 3mm ("T1") through-hole LEDs. Each LED has three leads, with one lead being common +, and the other two controlling red and blue. The two LEDs are wired in parallel.

The fault was that one of the LEDs has its blue section shorted. When I detached the blue lead of the defective LED, the other LED's blue section was able to operate (since there is no longer a short across it.)

Somewhat interestingly, the pattern of flux on this daughterboard showed evidence of having been hand reworked already -- evidently the LED that works had been replaced, whereas the one that's now defective had not.  That suggests there was a known problem with these LEDs.

Checking Digikey and the like, it looks difficult to get common-anode red-blue T1 LEDs, so I'm going to replace the red-blue with a plain blue and call it a day.

Graham
Reply
Like, Comment and Share Our Facebook: https://www.facebook.com/acepconline/
Join Our Facebook Group: https://www.facebook.com/groups/acepcminipc/


Forum Jump:


Users browsing this thread: 1 Guest(s)
  • Acer Mini PC
  • Apple Mini PC
  • ASRock Mini Pc
  • Asus Mini PC
  • AWOW Mini PC
  • AZULLE Mini PC
  • Beelink Mini PC
  • Best Mini PC
  • Bluetooth Headphones
  • Core i7 4790K Mini PC
  • CyberpowerPC Mini PC
  • Dell Mini PC
  • Digital Photo Frame
  • HP Mini PC
  • HYSTOU Mini PC
  • info
  • Intel
  • Intel Atom x5-Z8300 Mini PC
  • Intel Atom x5-Z8350 Mini PC
  • Intel Atom Z3735F Mini PC
  • Intel Celeron G1840 Mini PC
  • Intel Celeron J1900 Mini PC
  • Intel Celeron J3455 Mini PC
  • Intel Celeron N3050 Mini PC
  • Intel Celeron N3150 Mini PC
  • Intel Celeron N3450 Mini PC
  • Intel Core i3 4025U Mini PC
  • Intel Core i3 5005U Mini PC
  • Intel Core i3 6100U Mini PC
  • Intel Core i5 2500 Mini PC
  • Intel Core i5 3317U Mini PC
  • Intel Core i5 5200U Mini PC
  • Intel Core i5 6200U Mini PC
  • Intel Core i5 7200U Mini PC
  • Intel Core i5-4200U Mini PC
  • Intel Core i7 6700K Mini PC
  • Intel Core i7-4500U Mini PC
  • Intel Core i7-7500U Mini PC
  • Intel Mini PC
  • Intel Pentium J3710 Mini PC
  • Intel Pentium J4205 Mini PC
  • Intel Pentium N3540 Mini PC
  • Intel Pentium N3700 Mini PC
  • Intel Pentium N4200 Mini PC
  • Intel Xeon W3520 Mini PC
  • Jetway Mini PC
  • KINGDEL Mini PC
  • LENOVO IDEACENTRE Mini PC
  • Lenovo Mini PC
  • Lenovo ThinkCentre Mini PC
  • LIVA Mini PC
  • MeeGOpad Mini PC
  • Mini Computer
  • MINIX Mini PC
  • MSI Mini PC
  • News
  • NEXBOX Mini PC
  • Oemgenuine Mini PC
  • Partaker Mini PC
  • Plater Mini PC
  • Qotom Mini PC
  • Samsung Mini PC
  • Shuttle Mini PC
  • Windows 10 Mini PC
  • XCY Mini PC
  • XOTIC Mini PC
  • ZBOX Mini PC